linux-2.6
16 years agoxen64: map an initial chunk of physical memory
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:52 +0000 (15:06 -0700)] 
xen64: map an initial chunk of physical memory

Early in boot, map a chunk of extra physical memory for use later on.
We need a pool of mapped pages to allocate further pages to construct
pagetables mapping all physical memory.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen64: 64-bit starts using set_pte from very early
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:51 +0000 (15:06 -0700)] 
xen64: 64-bit starts using set_pte from very early

It also doesn't need the 32-bit hack version of set_pte for initial
pagetable construction, so just make it use the real thing.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen64: early mapping setup
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:50 +0000 (15:06 -0700)] 
xen64: early mapping setup

Set up the initial pagetables to map the kernel mapping into the
physical mapping space.  This makes __va() usable, since it requires
physical mappings.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen64: add hypervisor callbacks for events, etc
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:49 +0000 (15:06 -0700)] 
xen64: add hypervisor callbacks for events, etc

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen: cpu_detect is 32-bit only
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:48 +0000 (15:06 -0700)] 
xen: cpu_detect is 32-bit only

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen64: use set_fixmap for shared_info structure
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:47 +0000 (15:06 -0700)] 
xen64: use set_fixmap for shared_info structure

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen64: add 64-bit assembler
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:46 +0000 (15:06 -0700)] 
xen64: add 64-bit assembler

Split xen-asm into 32- and 64-bit files, and implement the 64-bit
variants.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen64: add asm-offsets
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:45 +0000 (15:06 -0700)] 
xen64: add asm-offsets

Add Xen vcpu_info offsets to asm-offsets_64.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen64: add xen-head code to head_64.S
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:44 +0000 (15:06 -0700)] 
xen64: add xen-head code to head_64.S

Add the Xen entrypoint and ELF notes to head_64.S.  Adapts xen-head.S
to compile either 32-bit or 64-bit.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen64: smp.c compile hacking
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:43 +0000 (15:06 -0700)] 
xen64: smp.c compile hacking

A number of random changes to make xen/smp.c compile in 64-bit mode.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>a
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86_64: add workaround for no %gs-based percpu
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:42 +0000 (15:06 -0700)] 
x86_64: add workaround for no %gs-based percpu

As a stopgap until Mike Travis's x86-64 gs-based percpu patches are
ready, provide workaround functions for x86_read/write_percpu for
Xen's use.

Specifically, this means that we can't really make use of vcpu
placement, because we can't use a single gs-based memory access to get
to vcpu fields.  So disable all that for now.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen: move smp setup into smp.c
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:41 +0000 (15:06 -0700)] 
xen: move smp setup into smp.c

Move all the smp_ops setup into smp.c, allowing a lot of things to
become static.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen64: get active_mm from the pda
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:40 +0000 (15:06 -0700)] 
xen64: get active_mm from the pda

x86_64 stores the active_mm in the pda, so fetch it from there.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen64: random ifdefs to mask out 32-bit only code
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:39 +0000 (15:06 -0700)] 
xen64: random ifdefs to mask out 32-bit only code

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen64: add extra pv_mmu_ops
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:38 +0000 (15:06 -0700)] 
xen64: add extra pv_mmu_ops

We need extra pv_mmu_ops for 64-bit, to deal with the extra level of
pagetable.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen64: fix calls into hypercall page
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:37 +0000 (15:06 -0700)] 
xen64: fix calls into hypercall page

The 64-bit calling convention for hypercalls uses different registers
from 32-bit.  Annoyingly, gcc's asm syntax doesn't have a way to
specify one of the extra numeric reigisters in a constraint, so we
must use explicitly placed register variables.  Given that we have to
do it for some args, may as well do it for all.

Also fix syntax gcc generates for the call instruction itself.  We
need a plain direct call, but the asm expansion which works on 32-bit
generates a rip-relative addressing mode in 64-bit, which is treated
as an indirect call.  The alternative is to pass the hypercall page
offset into the asm, and have it add it to the hypercall page start
address to generate the call.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen: fix 64-bit hypercall variants
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:36 +0000 (15:06 -0700)] 
xen: fix 64-bit hypercall variants

64-bit guests can pass 64-bit quantities in a single argument,
so fix up the hypercalls.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen: make ELF notes work for 32 and 64 bit
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:35 +0000 (15:06 -0700)] 
xen: make ELF notes work for 32 and 64 bit

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen64: define asm/xen/interface for 64-bit
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:34 +0000 (15:06 -0700)] 
xen64: define asm/xen/interface for 64-bit

Copy 64-bit definitions of various interface structures into place.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen: define set_pte from the outset
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:33 +0000 (15:06 -0700)] 
xen: define set_pte from the outset

We need set_pte to work from a relatively early point, so enable it
from the start.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen: add xen_arch_resume()/xen_timer_resume hook for ia64 support
Isaku Yamahata [Tue, 8 Jul 2008 22:06:32 +0000 (15:06 -0700)] 
xen: add xen_arch_resume()/xen_timer_resume hook for ia64 support

add xen_timer_resume() hook.

Timer resume should be done after event channel is resumed.
add xen_arch_resume() hook when ipi becomes usable after resume.
After resume, some cpu specific resource must be reinitialized
on ia64 that can't be set by another cpu.

However available hooks is run once on only one cpu so that ipi has
to be used.

During stop_machine_run() ipi can't be used because interrupt is masked.
So add another hook after stop_machine_run().
Another approach might be use resume hook which is run by
device_resume(). However device_resume() may be executed on
suspend error recovery path.

So it is necessary to determine whether it is executed on real resume path
or error recovery path.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen-netfront: fix xennet_release_tx_bufs()
Isaku Yamahata [Tue, 8 Jul 2008 22:06:31 +0000 (15:06 -0700)] 
xen-netfront: fix xennet_release_tx_bufs()

After restore on ia64 xen domain, kernel panics as follows.
This patch fixes it.

union skb_entry assumes sizeof(link->skb, pointer) ==
sizeof(list->link, unsigned).
However this isn't true on ia64. So  make link type unsigned long.
And introduced two accesor.

kernel unaligned access to 0xe0000000000000bd, ip=0xa0000001004c2ca0
xenwatch[14]: error during unaligned kernel access
 -1 [1]
Modules linked in:

Pid: 14, CPU 0, comm:             xenwatch
psr : 0000101008422010 ifs : 8000000000000307 ip  : [<a0000001004c2ca0>]    Not tainted (2.6.26-rc4xen-ia64-dirty)
ip is at dev_kfree_skb_irq+0x20/0x1a0
unat: 0000000000000000 pfs : 400000000000040b rsc : 0000000000000007
rnat: 0000000000000000 bsps: 0000000000000000 pr  : 000000000000a941
ldrs: 0000000000000000 ccv : 0000000000000000 fpsr: 0009804c8a70433f
csd : 0000000000000000 ssd : 0000000000000000
b0  : a0000001003efb70 b6  : a000000100070e40 b7  : a000000100070e40
f6  : 1003e000000fcb75352b1 f7  : 1003e000000000014ff97
f8  : 1003e00fcb74fc3454d80 f9  : 1003e0000000080000000
f10 : 1003e0000000000001431 f11 : 1003e0000000000989680
r1  : a000000100bfcf80 r2  : e0000000000000bd r3  : 000000000000308c
r8  : 0000000000000000 r9  : e00000000fc31310 r10 : a000000100a13b28
r11 : 0000000000000000 r12 : e00000000fd0fdf0 r13 : e00000000fd08000
r14 : 0000000000000000 r15 : e00000000fcc8000 r16 : 0000000000000009
r17 : e000010000104000 r18 : e000010000104000 r19 : a000000100a13b40
r20 : a0000001009c23f0 r21 : a0000001009fd4d0 r22 : 0000000000004000
r23 : 0000000000000000 r24 : fffffffffff04c10 r25 : 0000000000000002
r26 : 0000000000000000 r27 : 0000000000000000 r28 : e00000000fd08bd4
r29 : a0000001007570b8 r30 : a0000001009e5500 r31 : a0000001009e54a0

Call Trace:
 [<a000000100026000>] show_stack+0x40/0xa0
                                sp=e00000000fd0f670 bsp=e00000000fd08f68
 [<a000000100026a60>] show_regs+0x9a0/0x9e0
                                sp=e00000000fd0f840 bsp=e00000000fd08f10
 [<a000000100037680>] die+0x260/0x3a0
                                sp=e00000000fd0f840 bsp=e00000000fd08ec8
 [<a000000100037810>] die_if_kernel+0x50/0x80
                                sp=e00000000fd0f840 bsp=e00000000fd08e98
 [<a00000010003eb40>] ia64_handle_unaligned+0x2ea0/0x2fc0
                                sp=e00000000fd0f840 bsp=e00000000fd08df0
 [<a00000010001ca30>] ia64_prepare_handle_unaligned+0x30/0x60
                                sp=e00000000fd0fa10 bsp=e00000000fd08df0
 [<a00000010005d100>] paravirt_leave_kernel+0x0/0x40
                                sp=e00000000fd0fc20 bsp=e00000000fd08df0
 [<a0000001004c2ca0>] dev_kfree_skb_irq+0x20/0x1a0
                                sp=e00000000fd0fdf0 bsp=e00000000fd08db8
 [<a0000001003efb70>] xennet_release_tx_bufs+0xd0/0x120
                                sp=e00000000fd0fdf0 bsp=e00000000fd08d78
 [<a0000001003f14c0>] backend_changed+0xc40/0xf80
                                sp=e00000000fd0fdf0 bsp=e00000000fd08d08
 [<a00000010034bd50>] otherend_changed+0x190/0x1c0
                                sp=e00000000fd0fe00 bsp=e00000000fd08cc8
 [<a000000100349530>] xenwatch_thread+0x310/0x3c0
                                sp=e00000000fd0fe00 bsp=e00000000fd08ca0
 [<a0000001000cb040>] kthread+0xe0/0x160
                                sp=e00000000fd0fe30 bsp=e00000000fd08c68
 [<a000000100024450>] kernel_thread_helper+0x30/0x60
                                sp=e00000000fd0fe30 bsp=e00000000fd08c40
 [<a00000010001a8a0>] start_kernel_thread+0x20/0x40
                                sp=e00000000fd0fe30 bsp=e00000000fd08c40
Kernel panic - not syncing: Aiee, killing interrupt handler!

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoxen: print backtrace on multicall failure
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:30 +0000 (15:06 -0700)] 
xen: print backtrace on multicall failure

Print a backtrace if a multicall fails, to help with debugging.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86_64: unstatic get_local_pda
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:29 +0000 (15:06 -0700)] 
x86_64: unstatic get_local_pda

This allows Xen's xen_cpu_up() to allocate a pda for the new CPU.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86_64: adjust exception frame in ia32entry
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:28 +0000 (15:06 -0700)] 
x86_64: adjust exception frame in ia32entry

The 32-bit compat int $0x80 entrypoint needs exception frame
adjustment.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: use __page_aligned_data/bss
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:27 +0000 (15:06 -0700)] 
x86: use __page_aligned_data/bss

Update arch/x86's use of page-aligned variables.  The change to
arch/x86/xen/mmu.c fixes an actual bug, but the rest are cleanups
and to set a precedent.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86: clean up formatting of __switch_to
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:26 +0000 (15:06 -0700)] 
x86: clean up formatting of __switch_to

process_64.c:__switch_to has some very old strange formatting, some of
it dating back to pre-git.  Fix it up.

No functional changes.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86_64: there's no need to preallocate level1_fixmap_pgt
Jeremy Fitzhardinge [Tue, 8 Jul 2008 22:06:25 +0000 (15:06 -0700)] 
x86_64: there's no need to preallocate level1_fixmap_pgt

Early fixmap will allocate its own L1 pagetable page for fixmap
mappings, so there's no need to preallocate one.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agopvops-64: call paravirt_post_allocator_init() on setup_arch()
Eduardo Habkost [Tue, 8 Jul 2008 22:06:24 +0000 (15:06 -0700)] 
pvops-64: call paravirt_post_allocator_init() on setup_arch()

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agox86/paravirt: call paravirt_pagetable_setup_{start, done}
Eduardo Habkost [Tue, 8 Jul 2008 22:06:23 +0000 (15:06 -0700)] 
x86/paravirt: call paravirt_pagetable_setup_{start, done}

Call paravirt_pagetable_setup_{start,done}

These paravirt_ops functions were not being called on x86_64.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoMerge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Linus Torvalds [Wed, 16 Jul 2008 02:04:58 +0000 (19:04 -0700)] 
Merge branch 'merge' of git://git./linux/kernel/git/benh/powerpc

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (249 commits)
  powerpc: Fix pte_update for CONFIG_PTE_64BIT and !PTE_ATOMIC_UPDATES
  powerpc: Fix a build problem on ppc32 with new DMA_ATTRs
  ibm_newemac: Add MII mode support to the EMAC RGMII bridge.
  powerpc: Don't spin on sync instruction at boot time
  powerpc: Add VSX load/store alignment exception handler
  powerpc: fix giveup_vsx to save registers correctly
  powerpc: support for latencytop
  powerpc: Remove unnecessary condition when sanity-checking WIMG bits
  powerpc: Add PPC_FEATURE_PSERIES_PERFMON_COMPAT
  powerpc: Add driver for Barrier Synchronization Register
  powerpc: mman.h export fixups
  powerpc/fsl: update crypto node definition and device tree instances
  powerpc/fsl: Refactor device bindings
  powerpc/85xx: Minor fixes for 85xxds and 8536ds board.
  powerpc: Add 82xx/83xx/86xx to 6xx Multiplatform
  powerpc/85xx: publish of device for cds platforms
  powerpc/booke: don't reinitialize time base
  powerpc/86xx: Refactor pic init
  powerpc/CPM: Add i2c pins to dts and board setup
  cpm_uart: Support uart_wait_until_sent()
  ...

16 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6
Linus Torvalds [Wed, 16 Jul 2008 01:58:04 +0000 (18:58 -0700)] 
Merge git://git./linux/kernel/git/jejb/scsi-misc-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (102 commits)
  [SCSI] scsi_dh: fix kconfig related build errors
  [SCSI] sym53c8xx: Fix bogus sym_que_entry re-implementation of container_of
  [SCSI] scsi_cmnd.h: remove double inclusion of linux/blkdev.h
  [SCSI] make struct scsi_{host,target}_type static
  [SCSI] fix locking in host use of blk_plug_device()
  [SCSI] zfcp: Cleanup external header file
  [SCSI] zfcp: Cleanup code in zfcp_erp.c
  [SCSI] zfcp: zfcp_fsf cleanup.
  [SCSI] zfcp: consolidate sysfs things into one file.
  [SCSI] zfcp: Cleanup of code in zfcp_aux.c
  [SCSI] zfcp: Cleanup of code in zfcp_scsi.c
  [SCSI] zfcp: Move status accessors from zfcp to SCSI include file.
  [SCSI] zfcp: Small QDIO cleanups
  [SCSI] zfcp: Adapter reopen for large number of unsolicited status
  [SCSI] zfcp: Fix error checking for ELS ADISC requests
  [SCSI] zfcp: wait until adapter is finished with ERP during auto-port
  [SCSI] ibmvfc: IBM Power Virtual Fibre Channel Adapter Client Driver
  [SCSI] sg: Add target reset support
  [SCSI] lib: Add support for the T10 (SCSI) Data Integrity Field CRC
  [SCSI] sd: Move scsi_disk() accessor function to sd.h
  ...

16 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Wed, 16 Jul 2008 01:57:38 +0000 (18:57 -0700)] 
Merge git://git./linux/kernel/git/herbert/crypto-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  Revert crypto: prng - Deterministic CPRNG

16 years agoftrace: ftrace.txt updates
Steven Rostedt [Tue, 15 Jul 2008 14:57:33 +0000 (10:57 -0400)] 
ftrace: ftrace.txt updates

This patch includes ftrace.txt updates that address (mostly) comments from
Andrew Morton. It also includes updates that were suggested by Randy
Dunlap, John Kacur and David Teigland.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agoMerge commit 'origin/master'
Benjamin Herrenschmidt [Wed, 16 Jul 2008 01:07:59 +0000 (11:07 +1000)] 
Merge commit 'origin/master'

Manual merge of:

arch/powerpc/Kconfig
arch/powerpc/kernel/stacktrace.c
arch/powerpc/mm/slice.c
arch/ppc/kernel/smp.c

16 years agoMerge branch 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux...
Linus Torvalds [Tue, 15 Jul 2008 23:29:18 +0000 (16:29 -0700)] 
Merge branch 'x86/urgent' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: fix TSC build error on 32bit

16 years agoMerge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
Linus Torvalds [Tue, 15 Jul 2008 22:01:29 +0000 (15:01 -0700)] 
Merge branch 'upstream' of git://ftp.linux-mips.org/upstream-linus

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: (54 commits)
  [MIPS] Remove mips_machtype for LASAT machines
  [MIPS] Remove mips_machtype from EMMA2RH machines
  [MIPS] Remove mips_machtype from ARC based machines
  [MIPS] MTX-1 flash partition setup move to platform devices registration
  [MIPS] TXx9: cleanup and fix some sparse warnings
  [MIPS] TXx9: rename asm-mips/mach-jmr3927 to asm-mips/mach-tx39xx
  [MIPS] remove machtype for group Toshiba
  [MIPS] separate rbtx4927_time_init() and rbtx4937_time_init()
  [MIPS] separate rbtx4927_arch_init() and rbtx4937_arch_init()
  [MIPS] txx9_cpu_clock setup move to rbtx4927_time_init()
  [MIPS] txx9_board_vec set directly without mips_machtype
  [MIPS] IP22: Add platform device for Indy volume buttons
  [MIPS] cmbvr4133: Remove support
  [MIPS] remove wrppmc_machine_power_off()
  [MIPS] replace inline assembler to cpu_wait()
  [MIPS] IP22/28: Add platform devices for HAL2
  [MIPS] TXx9: Update and merge defconfigs
  [MIPS] TXx9: Make single kernel can support multiple boards
  [MIPS] TXx9: Update defconfigs
  [MIPS] TXx9: Reorganize PCI code
  ...

16 years agoDon't crash on IOMMU overflow in A100U2W driver
Mikulas Patocka [Tue, 15 Jul 2008 21:19:55 +0000 (17:19 -0400)] 
Don't crash on IOMMU overflow in A100U2W driver

Handle IOMMU overflow correctly, by retrying.  IOMMU errors can happen
and drivers must deal with them.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agoBUG_ON on kernel misbehavior on A100U2W driver
Mikulas Patocka [Tue, 15 Jul 2008 21:18:38 +0000 (17:18 -0400)] 
BUG_ON on kernel misbehavior on A100U2W driver

With broken Sparc64 IOMMU accounting, the kernel submits larger requests
then allowed.  Better to crash on BUG than corrupt memory.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Acked-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agoAdd udelay to A100U2W SCSI driver
Mikulas Patocka [Tue, 15 Jul 2008 21:16:38 +0000 (17:16 -0400)] 
Add udelay to A100U2W SCSI driver

udelay is required on Sun Ultra 5.

I don't know any reason or explanation for this, it was found purely
experimentally.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agoFix endianity in A100U2W SCSI driver
Mikulas Patocka [Tue, 15 Jul 2008 21:15:41 +0000 (17:15 -0400)] 
Fix endianity in A100U2W SCSI driver

Support big endian systems in a100u2w driver.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agogeneric ipi function calls: wait on alloc failure fallback
Jeremy Fitzhardinge [Tue, 15 Jul 2008 20:22:49 +0000 (13:22 -0700)] 
generic ipi function calls: wait on alloc failure fallback

When a GFP_ATOMIC allocation fails, it falls back to allocating the
data on the stack and converting it to a waiting call.

Make sure we actually wait in this case.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agoMerge branch 'generic-ipi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Tue, 15 Jul 2008 21:02:33 +0000 (14:02 -0700)] 
Merge branch 'generic-ipi-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'generic-ipi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (22 commits)
  generic-ipi: more merge fallout
  generic-ipi: merge fix
  x86, visws: use mach-default/entry_arch.h
  x86, visws: fix generic-ipi build
  generic-ipi: fixlet
  generic-ipi: fix s390 build bug
  generic-ipi: fix linux-next tree build failure
  fix: "smp_call_function: get rid of the unused nonatomic/retry argument"
  fix: "smp_call_function: get rid of the unused nonatomic/retry argument"
  fix "smp_call_function: get rid of the unused nonatomic/retry argument"
  on_each_cpu(): kill unused 'retry' parameter
  smp_call_function: get rid of the unused nonatomic/retry argument
  sh: convert to generic helpers for IPI function calls
  parisc: convert to generic helpers for IPI function calls
  mips: convert to generic helpers for IPI function calls
  m32r: convert to generic helpers for IPI function calls
  arm: convert to generic helpers for IPI function calls
  alpha: convert to generic helpers for IPI function calls
  ia64: convert to generic helpers for IPI function calls
  powerpc: convert to generic helpers for IPI function calls
  ...

Fix trivial conflicts due to rcu updates in kernel/rcupdate.c manually

16 years agoMerge branch 'core/rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Tue, 15 Jul 2008 20:59:31 +0000 (13:59 -0700)] 
Merge branch 'core/rcu-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'core/rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (23 commits)
  rcu classic: update qlen when cpu offline
  rcu: make rcutorture even more vicious: invoke RCU readers from irq handlers (timers)
  rcu: make quiescent rcutorture less power-hungry
  rcu, rcutorture: make quiescent rcutorture less power-hungry
  rcu: make rcutorture more vicious: reinstate boot-time testing
  rcu: make rcutorture more vicious: add stutter feature
  rcutorture: WARN_ON_ONCE(1) when detecting an error
  rcu: remove unused field struct rcu_data::rcu_tasklet
  Revert "prohibit rcutorture from being compiled into the kernel"
  rcu: fix nf_conntrack_helper.c build bug
  rculist.h: fix include in net/netfilter/nf_conntrack_netlink.c
  rcu: remove duplicated include in kernel/rcupreempt.c
  rcu: remove duplicated include in kernel/rcupreempt_trace.c
  RCU, rculist.h: fix list iterators
  rcu: fix rcu_try_flip_waitack_needed() to prevent grace-period stall
  rculist.h: use the rcu API
  rcu: split list.h and move rcu-protected lists into rculist.h
  sched: 1Q08 RCU doc update, add call_rcu_sched()
  rcu: add call_rcu_sched() and friends to rcutorture
  rcu: add rcu_barrier_sched() and rcu_barrier_bh()
  ...

16 years agomm: fix build on non-mmu machines
Sebastian Siewior [Tue, 15 Jul 2008 20:28:46 +0000 (22:28 +0200)] 
mm: fix build on non-mmu machines

Commit 1ea0704e0d aka "mm: add a ptep_modify_prot transaction abstraction"

caused:

|  CC      init/main.o
|In file included from include2/asm/pgtable.h:68,
|                 from /home/bigeasy/git/linux-2.6-m68k/include/linux/mm.h:39,
|                 from include2/asm/uaccess.h:8,
|                 from /home/bigeasy/git/linux-2.6-m68k/include/linux/poll.h:13,
|                 from /home/bigeasy/git/linux-2.6-m68k/include/linux/rtc.h:113,
|                 from /home/bigeasy/git/linux-2.6-m68k/include/linux/efi.h:19,
|                 from /home/bigeasy/git/linux-2.6-m68k/init/main.c:43:
|/linux-2.6/include/asm-generic/pgtable.h: In function '__ptep_modify_prot_start':
|/linux-2.6/include/asm-generic/pgtable.h:209: error: implicit declaration of function 'ptep_get_and_clear'
|/linux-2.6/include/asm-generic/pgtable.h:209: error: incompatible types in return
|/linux-2.6/include/asm-generic/pgtable.h: In function '__ptep_modify_prot_commit':
|/linux-2.6/include/asm-generic/pgtable.h:220: error: implicit declaration of function 'set_pte_at'
|make[2]: *** [init/main.o] Error 1
|make[1]: *** [init] Error 2
|make: *** [sub-make] Error 2

on my m68knommu box.

Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agoftrace: maintainer
Steven Rostedt [Tue, 15 Jul 2008 17:28:14 +0000 (13:28 -0400)] 
ftrace: maintainer

I'm willing to take responsibility for ftrace, and follow up on any
issues that arise due to it.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agox86: fix TSC build error on 32bit
Thomas Gleixner [Tue, 15 Jul 2008 20:08:04 +0000 (22:08 +0200)] 
x86: fix TSC build error on 32bit

Dave Hansen reported a build error on 32bit which went unnoticed
as newer gcc versions seem to optimize unused static functions
away before compiling them.

Make vread_tsc() depend on CONFIG_X86_64

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
16 years agogeneric-ipi: more merge fallout
Ingo Molnar [Tue, 15 Jul 2008 20:08:52 +0000 (22:08 +0200)] 
generic-ipi: more merge fallout

fix more API change fallout in recently merged upstream changes.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agogeneric-ipi: merge fix
Ingo Molnar [Tue, 15 Jul 2008 20:03:56 +0000 (22:03 +0200)] 
generic-ipi: merge fix

fix merge fallout:

arch/x86/pci/amd_bus.c: In function â€˜enable_pci_io_ecs':
arch/x86/pci/amd_bus.c:581: error: too many arguments to function â€˜on_each_cpu'

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoMerge branch 'generic-ipi' into generic-ipi-for-linus
Ingo Molnar [Tue, 15 Jul 2008 19:55:59 +0000 (21:55 +0200)] 
Merge branch 'generic-ipi' into generic-ipi-for-linus

Conflicts:

arch/powerpc/Kconfig
arch/s390/kernel/time.c
arch/x86/kernel/apic_32.c
arch/x86/kernel/cpu/perfctr-watchdog.c
arch/x86/kernel/i8259_64.c
arch/x86/kernel/ldt.c
arch/x86/kernel/nmi_64.c
arch/x86/kernel/smpboot.c
arch/x86/xen/smp.c
include/asm-x86/hw_irq_32.h
include/asm-x86/hw_irq_64.h
include/asm-x86/mach-default/irq_vectors.h
include/asm-x86/mach-voyager/irq_vectors.h
include/asm-x86/smp.h
kernel/Makefile

Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoMerge branch 'sbp2-spindown' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee139...
Linus Torvalds [Tue, 15 Jul 2008 19:39:44 +0000 (12:39 -0700)] 
Merge branch 'sbp2-spindown' of git://git./linux/kernel/git/ieee1394/linux1394-2.6

* 'sbp2-spindown' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
  ieee1394: sbp2: spin disks down on suspend and shutdown
  firewire: fw-sbp2: spin disks down on suspend and shutdown
  ieee1394: sbp2: fix spindown for PL-3507 and TSB42AA9 firmwares
  firewire: fw-sbp2: fix spindown for PL-3507 and TSB42AA9 firmwares
  scsi: sd: optionally set power condition in START STOP UNIT

16 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394...
Linus Torvalds [Tue, 15 Jul 2008 19:39:13 +0000 (12:39 -0700)] 
Merge branch 'for-linus' of git://git./linux/kernel/git/ieee1394/linux1394-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
  firewire: don't respond to broadcast write requests
  firewire: clean up fw_card reference counting
  firewire: clean up some includes
  firewire: remove unused struct members
  firewire: implement broadcast_channel CSR for 1394a compliance
  ieee1394: dump mmapped iso buffers in core files
  ieee1394: raw1394: Push the BKL down into the driver ioctls
  ieee1394: video1394: reorder module init, prepare BKL removal
  ieee1394: reduce log noise about config ROM CRC errors

16 years agoMerge branch 'core/rcu' into core/rcu-for-linus
Ingo Molnar [Tue, 15 Jul 2008 19:10:12 +0000 (21:10 +0200)] 
Merge branch 'core/rcu' into core/rcu-for-linus

16 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg...
Linus Torvalds [Tue, 15 Jul 2008 18:26:14 +0000 (11:26 -0700)] 
Merge branch 'for-linus' of git://git./linux/kernel/git/penberg/slab-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6:
  slab: rename slab_destroy_objs
  slub: current is always valid
  slub: Add check for kfree() of non slab objects.

16 years agoMerge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzi...
Linus Torvalds [Tue, 15 Jul 2008 18:18:10 +0000 (11:18 -0700)] 
Merge branch 'upstream-linus' of git://git./linux/kernel/git/jgarzik/libata-dev

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  AHCI: Remove an unnecessary flush from ahci_qc_issue
  AHCI: speed up resume
  [libata] Add support for VPD page b1
  ata: endianness annotations in pata drivers
  libata-eh: update atapi_eh_request_sense() to take @dev instead of @qc
  [libata] sata_svw: update code comments relating to data corruption
  libata/ahci: enclosure management support
  libata: improve EH internal command timeout handling
  libata: use ULONG_MAX to terminate reset timeout table
  libata: improve EH retry delay handling
  libata: consistently use msecs for time durations

16 years agoMerge branch 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6
Linus Torvalds [Tue, 15 Jul 2008 18:16:05 +0000 (11:16 -0700)] 
Merge branch 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6

* 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6: (56 commits)
  i2c: Add detection capability to new-style drivers
  i2c: Call client_unregister for new-style devices too
  i2c: Clean up old chip drivers
  i2c-ibm_iic: Register child nodes
  i2c: New-style EEPROM driver using device IDs
  i2c: Export the i2c_bus_type symbol
  i2c-au1550: Fix PM support
  i2c-dev: Delete empty detach_client callback
  i2c: Drop stray references to lm_sensors
  i2c: Check for ACPI resource conflicts
  i2c-ocores: basic PM support
  i2c-sibyte: SWARM I2C board initialization
  i2c-i801: Fix handling of error conditions
  i2c-i801: Rename local variable temp to status
  i2c-i801: Properly report bus arbitration loss
  i2c-i801: Remove verbose debugging messages
  i2c-algo-pcf: Drop unused struct members
  i2c-algo-pcf: Multi-master lost-arbitration improvement
  i2c: Deprecate the legacy gpio drivers
  i2c-pxa: Initialize early
  ...

16 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6
Linus Torvalds [Tue, 15 Jul 2008 18:15:36 +0000 (11:15 -0700)] 
Merge git://git./linux/kernel/git/bart/ide-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: (80 commits)
  ide-floppy: fix unfortunate function naming
  ide-tape: unify idetape_create_read/write_cmd
  ide: add ide_pc_intr() helper
  ide-{floppy,scsi}: read Status Register before stopping DMA engine
  ide-scsi: add more debugging to idescsi_pc_intr()
  ide-scsi: use pc->callback
  ide-floppy: add more debugging to idefloppy_pc_intr()
  ide-tape: always log debug info in idetape_pc_intr() if debugging is enabled
  ide-tape: add ide_tape_io_buffers() helper
  ide-tape: factor out DSC handling from idetape_pc_intr()
  ide-{floppy,tape}: move checking of ->failed_pc to ->callback
  ide: add ide_issue_pc() helper
  ide: add PC_FLAG_DRQ_INTERRUPT pc flag
  ide-scsi: move idescsi_map_sg() call out from idescsi_issue_pc()
  ide: add ide_transfer_pc() helper
  ide-scsi: set drive->scsi flag for devices handled by the driver
  ide-{cd,floppy,tape}: remove checking for drive->scsi
  ide: add PC_FLAG_ZIP_DRIVE pc flag
  ide-tape: factor out waiting for good ireason from idetape_transfer_pc()
  ide-tape: set PC_FLAG_DMA_IN_PROGRESS flag in idetape_transfer_pc()
  ...

16 years agoide-floppy: fix unfortunate function naming
Borislav Petkov [Tue, 15 Jul 2008 19:22:03 +0000 (21:22 +0200)] 
ide-floppy: fix unfortunate function naming

mv idefloppy_transfer_pc1 idefloppy_start_pc_transfer
mv idefloppy_transfer_pc2 idefloppy_transfer_pc

which describes their functionality and disambiguates them. There should be no
functionality change introduced by this patch.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-tape: unify idetape_create_read/write_cmd
Borislav Petkov [Tue, 15 Jul 2008 19:22:03 +0000 (21:22 +0200)] 
ide-tape: unify idetape_create_read/write_cmd

A straightforward one. There should be no functional change resulting from this
change.

[bart: minor fixups]

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide: add ide_pc_intr() helper
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:22:03 +0000 (21:22 +0200)] 
ide: add ide_pc_intr() helper

* ide-tape.c: add 'drive' argument to idetape_update_buffers().

* Add generic ide_pc_intr() helper to ide-atapi.c and then
  convert ide-{floppy,tape,scsi} device drivers to use it.

* ide-tape.c: remove no longer needed DBG_PC_INTR.

There should be no functional changes caused by this patch
(unless the debugging is explicitely compiled in).

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-{floppy,scsi}: read Status Register before stopping DMA engine
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:22:03 +0000 (21:22 +0200)] 
ide-{floppy,scsi}: read Status Register before stopping DMA engine

Read Status Register before stopping DMA engine to match ide-tape
device driver - it should be safe and shouldn't affect anything.

This is a preparation for adding generic ide_pc_intr() helper.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-scsi: add more debugging to idescsi_pc_intr()
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:22:02 +0000 (21:22 +0200)] 
ide-scsi: add more debugging to idescsi_pc_intr()

Add more debugging to idescsi_pc_intr() to match ide-tape's
idetape_pc_intr().

While at it:

* Correct the first debug message.

This is a preparation for adding generic ide_pc_intr() helper.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-scsi: use pc->callback
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:22:02 +0000 (21:22 +0200)] 
ide-scsi: use pc->callback

* Add ide_scsi_callback() pc->callback implementation, then update
  idescsi_check_condition() and idescsi_queue() to setup ->callback.

* Convert idescsi_pc_intr() to use pc->callback.

This is a preparation for adding generic ide_pc_intr() helper.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-floppy: add more debugging to idefloppy_pc_intr()
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:22:02 +0000 (21:22 +0200)] 
ide-floppy: add more debugging to idefloppy_pc_intr()

Add more debugging to idefloppy_pc_intr() to match ide-tape's
idetape_pc_intr().

While at it:

* Correct the first debug message.

* Log device name with "DMA finished" message.

This is a preparation for adding generic ide_pc_intr() helper.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-tape: always log debug info in idetape_pc_intr() if debugging is enabled
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:22:01 +0000 (21:22 +0200)] 
ide-tape: always log debug info in idetape_pc_intr() if debugging is enabled

Add DBG_PC_INTR debug level and use it to always log debug info
in idetape_pc_intr() if debugging is enabled.

While at it:

* Use drive->name instead of tape->name.

* Log device name with "DMA finished" message.

This is a preparation for adding generic ide_pc_intr() helper.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-tape: add ide_tape_io_buffers() helper
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:22:01 +0000 (21:22 +0200)] 
ide-tape: add ide_tape_io_buffers() helper

* Add ide_tape_io_buffers() helper which is a wrapper for
  idetape_{in,out}put_buffers() and convert idetape_pc_intr()
  to use it.

* Remove no longer used idetape_io_buf typedef.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>---
16 years agoide-tape: factor out DSC handling from idetape_pc_intr()
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:22:01 +0000 (21:22 +0200)] 
ide-tape: factor out DSC handling from idetape_pc_intr()

Factor out DSC handling from idetape_pc_intr() to ide_tape_handle_dsc()
helper as a preparation for adding generic ide_pc_intr() helper.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-{floppy,tape}: move checking of ->failed_pc to ->callback
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:22:01 +0000 (21:22 +0200)] 
ide-{floppy,tape}: move checking of ->failed_pc to ->callback

Move checking/resetting of ->failed_pc from ide*_pc_intr() to ->callback
as a preparation for adding generic ide_pc_intr() helper.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>---
16 years agoide: add ide_issue_pc() helper
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:22:00 +0000 (21:22 +0200)] 
ide: add ide_issue_pc() helper

Add generic ide_issue_pc() helper to ide-atapi.c and then
convert ide-{floppy,tape,scsi} device drivers to use it.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide: add PC_FLAG_DRQ_INTERRUPT pc flag
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:59 +0000 (21:21 +0200)] 
ide: add PC_FLAG_DRQ_INTERRUPT pc flag

Add PC_FLAG_DRQ_INTERRUPT pc flag, set it in ide*_do_request()
and check for it (instead of checking for IDE*_FLAG_DRQ_INTERRUPT)
in ide*_issue_pc().  This is a preparation for adding generic
ide_issue_pc() helper.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-scsi: move idescsi_map_sg() call out from idescsi_issue_pc()
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:58 +0000 (21:21 +0200)] 
ide-scsi: move idescsi_map_sg() call out from idescsi_issue_pc()

Move idescsi_map_sg() call out from idescsi_issue_pc()
to idescsi_do_request() as a preparation to adding generic
ide_issue_pc() helper.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide: add ide_transfer_pc() helper
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:58 +0000 (21:21 +0200)] 
ide: add ide_transfer_pc() helper

* Add ide-atapi.c file for generic ATAPI support together with
  CONFIG_IDE_ATAPI config option.

* Add generic ide_transfer_pc() helper to ide-atapi.c and then
  convert ide-{floppy,tape,scsi} device drivers to use it.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-scsi: set drive->scsi flag for devices handled by the driver
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:58 +0000 (21:21 +0200)] 
ide-scsi: set drive->scsi flag for devices handled by the driver

This is a preparation for adding generic ide_transfer_pc() helper.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-{cd,floppy,tape}: remove checking for drive->scsi
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:57 +0000 (21:21 +0200)] 
ide-{cd,floppy,tape}: remove checking for drive->scsi

Remove checking for drive->scsi which is no longer set by IDE core code
(leave the flag since it will be re-used for generic ATAPI support).

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide: add PC_FLAG_ZIP_DRIVE pc flag
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:57 +0000 (21:21 +0200)] 
ide: add PC_FLAG_ZIP_DRIVE pc flag

Add PC_FLAG_ZIP_DRIVE pc flag, set it in idefloppy_do_request()
and check for it (instead of checking for IDEFLOPPY_FLAG_ZIP_DRIVE)
in idefloppy_transfer_pc().  This is a preparation for adding
generic ide_transfer_pc() helper.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-tape: factor out waiting for good ireason from idetape_transfer_pc()
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:57 +0000 (21:21 +0200)] 
ide-tape: factor out waiting for good ireason from idetape_transfer_pc()

Factor out waiting for good ireason from idetape_transfer_pc()
to ide_tape_wait_ireason() as a preparation for adding generic
ide_transfer_pc() helper.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-tape: set PC_FLAG_DMA_IN_PROGRESS flag in idetape_transfer_pc()
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:57 +0000 (21:21 +0200)] 
ide-tape: set PC_FLAG_DMA_IN_PROGRESS flag in idetape_transfer_pc()

Set PC_FLAG_DMA_IN_PROGRESS flag in idetape_transfer_pc() instead of
idetape_issue_pc() to match the other ATAPI device drivers.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-floppy: start DMA engine in idefloppy_transfer_pc1()
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:56 +0000 (21:21 +0200)] 
ide-floppy: start DMA engine in idefloppy_transfer_pc1()

Start DMA engine and set PC_FLAG_DMA_IN_PROGRESS flag in
idefloppy_transfer_pc1() instead of idefloppy_issue_pc()
so the Status Register and the Interrupt Reason Register
are checked first.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-{floppy,tape}: PC_FLAG_DMA_RECOMMENDED -> PC_FLAG_DMA_OK
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:56 +0000 (21:21 +0200)] 
ide-{floppy,tape}: PC_FLAG_DMA_RECOMMENDED -> PC_FLAG_DMA_OK

* Use PC_FLAG_DMA_OK flag instead of PC_FLAG_DMA_RECOMMENDED one.

* Remove no longer used PC_FLAG_DMA_RECOMMENDED flag.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-{floppy,tape}: merge pc->idefloppy_callback and pc->idetape_callback
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:56 +0000 (21:21 +0200)] 
ide-{floppy,tape}: merge pc->idefloppy_callback and pc->idetape_callback

Merge pc->idefloppy_callback and pc->idetape_callback into pc->callback.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-floppy: merge callbacks
Borislav Petkov [Tue, 15 Jul 2008 19:21:56 +0000 (21:21 +0200)] 
ide-floppy: merge callbacks

The appropriate functionality of the callback is established through querying
the ATAPI packet command in pc->c[0].

While at it, simplify if (floppy->failed_pc)-branch to be found in the original
idefloppy_request_sense_callback().

Bart:
- keep handling for blk_pc_request() requests unchanged + add FIXME
- add uptodate variable + leave just one idefloppy_end_request() call
- add newline to the debug message

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-tape: make pc->idetape_callback void
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:55 +0000 (21:21 +0200)] 
ide-tape: make pc->idetape_callback void

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-tape: merge callbacks
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:55 +0000 (21:21 +0200)] 
ide-tape: merge callbacks

The appropriate functionality of the callback is established through querying
the ATAPI packet command in pc->c[0].

While at it:
- add uptodate variable + leave just one idetape_end_request() call
- don't use HWGROUP() macro

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-tape: make idetape_retry_pc() void
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:55 +0000 (21:21 +0200)] 
ide-tape: make idetape_retry_pc() void

idetape_retry_pc() always returns ide_stopped so make it void.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-{floppy,tape,scsi}: log device name instead of driver name
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:54 +0000 (21:21 +0200)] 
ide-{floppy,tape,scsi}: log device name instead of driver name

Log device name instead of driver name in *_pc_intr() and *_transfer_pc*().

While at it:

* Merge two consecutive printk()-s in *_pc_intr() together.

* Replace "floppy"/"tape"/"scsi" references in printk()-s by "device".

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-floppy: merge idefloppy_transfer_pc() and idefloppy_transfer_pc1()
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:54 +0000 (21:21 +0200)] 
ide-floppy: merge idefloppy_transfer_pc() and idefloppy_transfer_pc1()

* Check IDEFLOPPY_FLAG_ZIP_DRIVE flag in idefloppy_transfer_pc1()
  and skip idefloppy_transfer_pc2()-phase if the flag is not set.

* Always use idefloppy_transfer_pc1() in idefloppy_issue_pc()
  and remove no longer needed idefloppy_transfer_pc().

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-tape: remove SIMULATE_ERRORS debug code
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:54 +0000 (21:21 +0200)] 
ide-tape: remove SIMULATE_ERRORS debug code

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-tape: remove stale comments from idetape_pc_intr()
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:54 +0000 (21:21 +0200)] 
ide-tape: remove stale comments from idetape_pc_intr()

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-tape: remove unneeded CONFIG_BLK_DEV_IDEDMA ifdef
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:54 +0000 (21:21 +0200)] 
ide-tape: remove unneeded CONFIG_BLK_DEV_IDEDMA ifdef

PC_FLAG_DMA_IN_PROGRESS flag is never set if DMA support is disabled.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-tape: remove superfluous warning message from idetape_issue_pc()
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:53 +0000 (21:21 +0200)] 
ide-tape: remove superfluous warning message from idetape_issue_pc()

ide_dma_off() prints info about DMA being disabled.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-tape: remove superfluous error message from idetape_pc_intr()
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:53 +0000 (21:21 +0200)] 
ide-tape: remove superfluous error message from idetape_pc_intr()

ide_dma_off() prints info about DMA being disabled.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-tape: idetape_pc_intr() should use local_irq_enable_in_hardirq()
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:53 +0000 (21:21 +0200)] 
ide-tape: idetape_pc_intr() should use local_irq_enable_in_hardirq()

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-scsi: add debug_log() macro
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:52 +0000 (21:21 +0200)] 
ide-scsi: add debug_log() macro

Add debug_log() macro and convert the driver to use it.

[ This makes debug messages to be always prefixed with "ide-scsi: "
  and use KERN_INFO level. ]

While at it:

* Change "DMA complete" debug message to "DMA finished" to match
  other ATAPI device drivers.

* Use __func__.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-scsi: remove superfluous BUG_ON() from idescsi_transfer_pc()
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:52 +0000 (21:21 +0200)] 
ide-scsi: remove superfluous BUG_ON() from idescsi_transfer_pc()

ide_set_handler() bugs on ->handler == NULL so no need to do it
in idescsi_transfer_pc().

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-scsi: merge idescsi_input_buffers() and idescsi_output_buffers()
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:52 +0000 (21:21 +0200)] 
ide-scsi: merge idescsi_input_buffers() and idescsi_output_buffers()

* Merge idescsi_input_buffers() and idescsi_output_buffers()
  into ide_scsi_io_buffers() helper.

While at it:

* Log device name instead of driver name on error.

* Use xfer_func_t.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-scsi: fix Interrupt Reason checking in idescsi_pc_intr()
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:52 +0000 (21:21 +0200)] 
ide-scsi: fix Interrupt Reason checking in idescsi_pc_intr()

Set PC_FLAG_WRITING pc flag in idescsi_queue() (if needed)
and then fix Interrupt Reason checking in idescsi_pc_intr().

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-scsi: fix handling of DMA errors in idescsi_pc_intr()
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:51 +0000 (21:21 +0200)] 
ide-scsi: fix handling of DMA errors in idescsi_pc_intr()

Check return value of ->dma_end method and if there was a DMA error
handle it accordingly (set PC_FLAG_DMA_ERROR pc flag, don't update
pc->xferred and increase rq->errors).

Also move debug message in the right place while at it.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-scsi: fix DRQ checking for DMA transfers in idescsi_pc_intr()
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:51 +0000 (21:21 +0200)] 
ide-scsi: fix DRQ checking for DMA transfers in idescsi_pc_intr()

If DRQ bit of Status Register is not cleared it is an error condition
and should be handled accordingly (disable DMA + reset the device).

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide-scsi: fix race in idescsi_transfer_pc()
Bartlomiej Zolnierkiewicz [Tue, 15 Jul 2008 19:21:51 +0000 (21:21 +0200)] 
ide-scsi: fix race in idescsi_transfer_pc()

Start DMA engine before sending content of packet command (otherwise
it is possible that IRQ will happen before DMA engine is started).

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoide: remove action argument in ide_do_drive_cmd
FUJITA Tomonori [Tue, 15 Jul 2008 19:21:51 +0000 (21:21 +0200)] 
ide: remove action argument in ide_do_drive_cmd

ide_do_drive_cmd is called only with ide_preempt action argument. So
we can remove the action argument in ide_do_drive_cmd and ide_action_t
typedef.

This patch also includes two minor cleanups: 1) ide_do_drive_cmd
always succeeds so we don't need the return value; 2) the callers use
blk_rq_init before ide_do_drive_cmd so there is no need to initialize
rq->errors.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>