[PATCH 09/10] block: limit the Write Zeroes to manually writing zeroes fallback

Christoph Hellwig
2024-07-01T16:52:59Z

Only fall back from hardware Write Zeroes failures when
blkdev_issue_write_zeroes returns -EOPNOTSUPP;

Note that blkdev_issue_write_zeroes turns any failure into -EOPNOTSUPP
when the write zeroes queue limit has been cleared to 0, so this still
catches all I/O errors where the driver detected missing support
for the hardware acceleration.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
block/blk-lib.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/blk-lib.c b/block/blk-lib.c
index 9585178a51a60c..95a22e7b1d3b85 100644
--- a/block/blk-lib.c
+++ b/block/blk-lib.c
@@ -287,7 +287,7 @@ int blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
if (bdev_write_zeroes_sectors(bdev)) {
ret = blkdev_issue_write_zeroes(bdev, sector, nr_sects,
gfp_mask, flags);
- if (!ret)
+ if (ret != -EOPNOTSUPP)
return ret;
}

--
2.43.0