[PATCH 12/19] xen-blkback: bio_alloc can't fail if it is allow to sleep
Remove handling of NULL returns from sleeping bio_alloc calls given that
those can't fail.
Signed-off-by: Christoph Hellwig
---
drivers/block/xen-blkback/blkback.c | 14 --
1 file changed, 14 deletions(-)
diff --git a/drivers/block/xen-blkback/blkback.c
b/drivers/block/xen-blkback/blkback.c
index 14e452896d04c..6bb2ad7692065 100644
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -1327,9 +1327,6 @@ static int dispatch_rw_block_io(struct xen_blkif_ring
*ring,
seg[i].nsec << 9,
seg[i].offset) == 0)) {
bio = bio_alloc(GFP_KERNEL, bio_max_segs(nseg - i));
- if (unlikely(bio == NULL))
- goto fail_put_bio;
-
biolist[nbio++] = bio;
bio_set_dev(bio, preq.bdev);
bio->bi_private = pending_req;
@@ -1346,9 +1343,6 @@ static int dispatch_rw_block_io(struct xen_blkif_ring
*ring,
BUG_ON(operation_flags != REQ_PREFLUSH);
bio = bio_alloc(GFP_KERNEL, 0);
- if (unlikely(bio == NULL))
- goto fail_put_bio;
-
biolist[nbio++] = bio;
bio_set_dev(bio, preq.bdev);
bio->bi_private = pending_req;
@@ -1381,14 +1375,6 @@ static int dispatch_rw_block_io(struct xen_blkif_ring
*ring,
free_req(ring, pending_req);
msleep(1); /* back off a bit */
return -EIO;
-
- fail_put_bio:
- for (i = 0; i < nbio; i++)
- bio_put(biolist[i]);
- atomic_set(_req->pendcnt, 1);
- __end_block_io_op(pending_req, BLK_STS_RESOURCE);
- msleep(1); /* back off a bit */
- return -EIO;
}
--
2.30.2
[PATCH 12/19] xen-blkback: bio_alloc can't fail if it is allow to sleep
Remove handling of NULL returns from sleeping bio_alloc calls given that
those can't fail.
Signed-off-by: Christoph Hellwig
---
drivers/block/xen-blkback/blkback.c | 14 --
1 file changed, 14 deletions(-)
diff --git a/drivers/block/xen-blkback/blkback.c
b/drivers/block/xen-blkback/blkback.c
index 14e452896d04c..6bb2ad7692065 100644
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -1327,9 +1327,6 @@ static int dispatch_rw_block_io(struct xen_blkif_ring
*ring,
seg[i].nsec << 9,
seg[i].offset) == 0)) {
bio = bio_alloc(GFP_KERNEL, bio_max_segs(nseg - i));
- if (unlikely(bio == NULL))
- goto fail_put_bio;
-
biolist[nbio++] = bio;
bio_set_dev(bio, preq.bdev);
bio->bi_private = pending_req;
@@ -1346,9 +1343,6 @@ static int dispatch_rw_block_io(struct xen_blkif_ring
*ring,
BUG_ON(operation_flags != REQ_PREFLUSH);
bio = bio_alloc(GFP_KERNEL, 0);
- if (unlikely(bio == NULL))
- goto fail_put_bio;
-
biolist[nbio++] = bio;
bio_set_dev(bio, preq.bdev);
bio->bi_private = pending_req;
@@ -1381,14 +1375,6 @@ static int dispatch_rw_block_io(struct xen_blkif_ring
*ring,
free_req(ring, pending_req);
msleep(1); /* back off a bit */
return -EIO;
-
- fail_put_bio:
- for (i = 0; i < nbio; i++)
- bio_put(biolist[i]);
- atomic_set(_req->pendcnt, 1);
- __end_block_io_op(pending_req, BLK_STS_RESOURCE);
- msleep(1); /* back off a bit */
- return -EIO;
}
--
2.30.2
