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Commit bef13315 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
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block: don't try to discard from __blkdev_issue_zeroout



Discard can return -EIO asynchronously if the alignment for the request
isn't suitable for the driver, which makes a proper fallback to other
methods in __blkdev_issue_zeroout impossible.  Thus only issue a sync
discard from blkdev_issue_zeroout an don't try discard at all from
__blkdev_issue_zeroout as a non-invasive workaround.

One more reason why abusing discard for zeroing must die..

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reported-by: default avatarEryu Guan <eguan@redhat.com>
Fixes: e73c23ff ("block: add async variant of blkdev_issue_zeroout")
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent f80de881
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