aboutsummaryrefslogtreecommitdiff
path: root/block
diff options
context:
space:
mode:
authorNicolai Stange <nicstange@gmail.com>2016-12-04 14:56:39 +0100
committerJens Axboe <axboe@fb.com>2016-12-05 07:54:39 -0700
commit58886785db318588f95c8036abb2a47016c1f14c (patch)
tree89095602dbb2203899f9e32659c145308bba0608 /block
parente88f72cb9f54f6d244e55f629fe5e2f34ca6f9ed (diff)
downloadlinux-stericsson-58886785db318588f95c8036abb2a47016c1f14c.tar.gz
block: fix unintended fallthrough in generic_make_request_checks()
Since commit e73c23ff736e ("block: add async variant of blkdev_issue_zeroout") messages like the following show up: EXT4-fs (dm-1): Delayed block allocation failed for inode 2368848 at logical offset 0 with max blocks 1 with error 95 EXT4-fs (dm-1): This should not happen!! Data will be lost Due to the following fallthrough introduced with commit 2d253440b5af ("block: Define zoned block device operations"), generic_make_request_checks() would accept a REQ_OP_WRITE_SAME bio only if the block device supports "write same" *and* is a zoned one: switch (bio_op(bio)) { [...] case REQ_OP_WRITE_SAME: if (!bdev_write_same(bio->bi_bdev)) goto not_supported; case REQ_OP_ZONE_REPORT: case REQ_OP_ZONE_RESET: if (!bdev_is_zoned(bio->bi_bdev)) goto not_supported; break; [...] } Thus, although the bio setup as done by __blkdev_issue_write_same() from commit e73c23ff736e ("block: add async variant of blkdev_issue_zeroout") would succeed, its actual submission would not, resulting in the EOPNOTSUPP == 95. Fix this by removing the fallthrough which, due to the lack of an explicit comment, seems to be unintended anyway. Fixes: e73c23ff736e ("block: add async variant of blkdev_issue_zeroout") Fixes: 2d253440b5af ("block: Define zoned block device operations") Signed-off-by: Nicolai Stange <nicstange@gmail.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
-rw-r--r--block/blk-core.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index 3f2eb8d80189..4b7ec5958055 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1945,6 +1945,7 @@ generic_make_request_checks(struct bio *bio)
case REQ_OP_WRITE_SAME:
if (!bdev_write_same(bio->bi_bdev))
goto not_supported;
+ break;
case REQ_OP_ZONE_REPORT:
case REQ_OP_ZONE_RESET:
if (!bdev_is_zoned(bio->bi_bdev))