AuxXxilium/linux_dsm_epyc7002
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Merge branch 'for-linus' of git://git.kernel.dk/linux-block

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Pull block fix from Jens Axboe:
 "A single fix that should go into 4.10, fixing a regression on some
  devices with the WRITE_SAME command"

* 'for-linus' of git://git.kernel.dk/linux-block:
  block: don't try Write Same from __blkdev_issue_zeroout
This commit is contained in:
Linus Torvalds 2017-02-08 09:56:15 -08:00
commit 23fbe2cdc1
1 changed files with 4 additions and 5 deletions
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9
block/blk-lib.c
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@ -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);