struct blkfront_info *info = req->rq_disk->private_data;
unsigned long buffer_mfn;
struct blkif_request *ring_req;
- struct bio *bio;
+ struct req_iterator iter;
struct bio_vec *bvec;
- int idx;
unsigned long id;
unsigned int fsect, lsect;
int ref;
ring_req->operation = BLKIF_OP_WRITE_BARRIER;
ring_req->nr_segments = 0;
- rq_for_each_bio (bio, req) {
- bio_for_each_segment (bvec, bio, idx) {
- BUG_ON(ring_req->nr_segments
- == BLKIF_MAX_SEGMENTS_PER_REQUEST);
- buffer_mfn = pfn_to_mfn(page_to_pfn(bvec->bv_page));
- fsect = bvec->bv_offset >> 9;
- lsect = fsect + (bvec->bv_len >> 9) - 1;
- /* install a grant reference. */
- ref = gnttab_claim_grant_reference(&gref_head);
- BUG_ON(ref == -ENOSPC);
-
- gnttab_grant_foreign_access_ref(
+ rq_for_each_segment(bvec, req, iter) {
+ BUG_ON(ring_req->nr_segments == BLKIF_MAX_SEGMENTS_PER_REQUEST);
+ buffer_mfn = pfn_to_mfn(page_to_pfn(bvec->bv_page));
+ fsect = bvec->bv_offset >> 9;
+ lsect = fsect + (bvec->bv_len >> 9) - 1;
+ /* install a grant reference. */
+ ref = gnttab_claim_grant_reference(&gref_head);
+ BUG_ON(ref == -ENOSPC);
+
+ gnttab_grant_foreign_access_ref(
ref,
info->xbdev->otherend_id,
buffer_mfn,
rq_data_dir(req) );
- info->shadow[id].frame[ring_req->nr_segments] =
+ info->shadow[id].frame[ring_req->nr_segments] =
mfn_to_pfn(buffer_mfn);
- ring_req->seg[ring_req->nr_segments] =
+ ring_req->seg[ring_req->nr_segments] =
(struct blkif_request_segment) {
.gref = ref,
.first_sect = fsect,
.last_sect = lsect };
- ring_req->nr_segments++;
- }
+ ring_req->nr_segments++;
}
info->ring.req_prod_pvt++;
RING_IDX i, rp;
unsigned long flags;
struct blkfront_info *info = (struct blkfront_info *)dev_id;
- int uptodate;
+ int error;
spin_lock_irqsave(&blkif_io_lock, flags);
add_id_to_freelist(info, id);
- uptodate = (bret->status == BLKIF_RSP_OKAY);
+ error = (bret->status == BLKIF_RSP_OKAY) ? 0 : -EIO;
switch (bret->operation) {
case BLKIF_OP_WRITE_BARRIER:
if (unlikely(bret->status == BLKIF_RSP_EOPNOTSUPP)) {
printk(KERN_WARNING "blkfront: %s: write barrier op failed\n",
info->gd->disk_name);
- uptodate = -EOPNOTSUPP;
+ error = -EOPNOTSUPP;
info->feature_barrier = 0;
xlvbd_barrier(info);
}
dev_dbg(&info->xbdev->dev, "Bad return from blkdev data "
"request: %x\n", bret->status);
- ret = end_that_request_first(req, uptodate,
- req->hard_nr_sectors);
+ ret = __blk_end_request(req, error, blk_rq_bytes(req));
BUG_ON(ret);
- end_that_request_last(req, uptodate);
break;
default:
BUG();