diff options
| author | Christoph Hellwig <hch@lst.de> | 2017-02-05 18:10:35 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-02-06 09:34:46 -0700 |
| commit | eeeefd41843218c55a8782a6920f044d9bf6207a (patch) | |
| tree | c342eac46626e62745aa8e1a982626efca8b121d /block/blk-lib.c | |
| parent | c14024dbb156c8392908aaa822097d27c6af8ec8 (diff) | |
| download | lwn-eeeefd41843218c55a8782a6920f044d9bf6207a.tar.gz lwn-eeeefd41843218c55a8782a6920f044d9bf6207a.zip | |
block: don't try Write Same from __blkdev_issue_zeroout
Write Same can return an error asynchronously if it turns out the
underlying SCSI device does not support Write Same, which makes a
proper fallback to other methods in __blkdev_issue_zeroout impossible.
Thus only issue a Write Same from blkdev_issue_zeroout an don't try it
at all from __blkdev_issue_zeroout as a non-invasive workaround.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Junichi Nomura <j-nomura@ce.jp.nec.com>
Fixes: e73c23ff ("block: add async variant of blkdev_issue_zeroout")
Tested-by: Junichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-lib.c')
| -rw-r--r-- | block/blk-lib.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/block/blk-lib.c b/block/blk-lib.c index f8c82a9b4012..ed1e78e24db0 100644 --- a/block/blk-lib.c +++ b/block/blk-lib.c @@ -306,11 +306,6 @@ int __blkdev_issue_zeroout(struct block_device *bdev, sector_t sector, if (ret == 0 || (ret && ret != -EOPNOTSUPP)) goto out; - ret = __blkdev_issue_write_same(bdev, sector, nr_sects, gfp_mask, - ZERO_PAGE(0), biop); - if (ret == 0 || (ret && ret != -EOPNOTSUPP)) - goto out; - ret = 0; while (nr_sects != 0) { bio = next_bio(bio, min(nr_sects, (sector_t)BIO_MAX_PAGES), @@ -369,6 +364,10 @@ int blkdev_issue_zeroout(struct block_device *bdev, sector_t sector, return 0; } + if (!blkdev_issue_write_same(bdev, sector, nr_sects, gfp_mask, + ZERO_PAGE(0))) + return 0; + blk_start_plug(&plug); ret = __blkdev_issue_zeroout(bdev, sector, nr_sects, gfp_mask, &bio, discard); |