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block: flip iter directions in blk_rq_integrity_map_user()

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blk_rq_integrity_map_user() creates the ubuf iter with ITER_DEST for
write-direction operations and ITER_SOURCE for read-direction ones.
This is backwards; writes use the user buffer as a source for metadata
and reads use it as a destination. Switch to the rq_data_dir() helper,
which maps writes to ITER_SOURCE (WRITE) and reads to ITER_DEST(READ).

Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>
Fixes: fe8f4ca710 ("block: modify bio_integrity_map_user to accept iov_iter as argument")
Link: https://lore.kernel.org/r/20250603184752.1185676-1-csander@purestorage.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Caleb Sander Mateos 2025-06-03 12:47:51 -06:00 committed by Jens Axboe
parent c09a8b00f8
commit 43a67dd812
1 changed files with 1 additions and 6 deletions
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7
block/blk-integrity.c
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@ -117,13 +117,8 @@ int blk_rq_integrity_map_user(struct request *rq, void __user *ubuf,
{
int ret;
struct iov_iter iter;
unsigned int direction;
if (op_is_write(req_op(rq)))
direction = ITER_DEST;
else
direction = ITER_SOURCE;
iov_iter_ubuf(&iter, direction, ubuf, bytes);
iov_iter_ubuf(&iter, rq_data_dir(rq), ubuf, bytes);
ret = bio_integrity_map_user(rq->bio, &iter);
if (ret)
return ret;