6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Christoph Hellwig <hch@xxxxxx> [ Upstream commit 7ecd2cd4fae3e8410c0a6620f3a83dcdbb254f02 ] Otherwise it can create unaligned writes on zoned devices. Fixes: a805a4fa4fa3 ("block: introduce zone_write_granularity limit") Signed-off-by: Christoph Hellwig <hch@xxxxxx> Reviewed-by: Damien Le Moal <dlemoal@xxxxxxxxxx> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx> Link: https://lore.kernel.org/r/20241104062647.91160-3-hch@xxxxxx Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- block/blk-merge.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/block/blk-merge.c b/block/blk-merge.c index 75d2461b69e40..5baa950f34fe2 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -287,6 +287,14 @@ static bool bvec_split_segs(const struct queue_limits *lim, return len > 0 || bv->bv_len > max_len; } +static unsigned int bio_split_alignment(struct bio *bio, + const struct queue_limits *lim) +{ + if (op_is_write(bio_op(bio)) && lim->zone_write_granularity) + return lim->zone_write_granularity; + return lim->logical_block_size; +} + /** * bio_split_rw_at - check if and where to split a read/write bio * @bio: [in] bio to be split @@ -349,7 +357,7 @@ int bio_split_rw_at(struct bio *bio, const struct queue_limits *lim, * split size so that each bio is properly block size aligned, even if * we do not use the full hardware limits. */ - bytes = ALIGN_DOWN(bytes, lim->logical_block_size); + bytes = ALIGN_DOWN(bytes, bio_split_alignment(bio, lim)); /* * Bio splitting may cause subtle trouble such as hang when doing sync -- 2.43.0