USB: composite: avoid inconsistent lock state
Avoid the following INFO from lock debugging:
[ 369.126112] =================================
[ 369.132063] [ INFO: inconsistent lock state ]
[ 369.136457] 2.6.28-maemo1 #1
[ 369.139387] ---------------------------------
[ 369.143782] inconsistent {hardirq-on-W} -> {in-hardirq-W} usage.
[ 369.149855] swapper/0 [HC1[1]:SC0[0]:HE0:SE1] takes:
[ 369.154890] (&cdev->lock){+-..}, at: [<
bf1979f0>] composite_disconnect+0x1c/0]
[ 369.163404] {hardirq-on-W} state was registered at:
[ 369.168348] [<
c00788a8>] __lock_acquire+0x5d0/0x7d8
[ 369.173506] [<
c0078b14>] lock_acquire+0x64/0x78
[ 369.178266] [<
c0263a34>] _spin_lock+0x4c/0x80
[ 369.182905] [<
bf19597c>] usb_function_deactivate+0x20/0x70 [g_nokia]
[ 369.189527] [<
bf1a0a88>] 0xbf1a0a88
[ 369.193281] [<
bf19f450>] 0xbf19f450
[ 369.197004] [<
bf19fa3c>] 0xbf19fa3c
[ 369.200758] [<
bf1a03a0>] 0xbf1a03a0
[ 369.204481] [<
bf19f254>] 0xbf19f254
[ 369.208204] [<
bf1a0158>] 0xbf1a0158
[ 369.211927] [<
bf1a130c>] 0xbf1a130c
[ 369.215650] [<
c01c21f0>] usb_gadget_register_driver+0x12c/0x28c
[ 369.221846] [<
bf1a06bc>] 0xbf1a06bc
[ 369.225569] [<
bf1a06e8>] 0xbf1a06e8
[ 369.229322] [<
c002c2dc>] __exception_text_end+0x64/0x19c
[ 369.234877] [<
c0081628>] sys_init_module+0x9c/0x194
[ 369.240004] [<
c002c8e0>] ret_fast_syscall+0x0/0x2c
[ 369.245039] [<
ffffffff>] 0xffffffff
[ 369.248793] irq event stamp: 218356
[ 369.252302] hardirqs last enabled at (218355): [<
c003a77c>] omap3_enter_idle+8
[ 369.260420] hardirqs last disabled at (218356): [<
c0264774>] __irq_svc+0x34/0x0
[ 369.267927] softirqs last enabled at (218348): [<
c00585a4>] __do_softirq+0x134
[ 369.275892] softirqs last disabled at (218335): [<
c005899c>] irq_exit+0x60/0xb0
[ 369.283308]
[ 369.283308] other info that might help us debug this:
[ 369.289930] no locks held by swapper/0.
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
projects / linux-2.6 / commit
