io_uring/rsrc: fix incorrect assignment of iter->nr_segs in io_import_fixed

BugLink: https://bugs.launchpad.net/bugs/2075154

[ Upstream commit a23800f08a60787dfbf2b87b2e6ed411cb629859 ]

In io_import_fixed when advancing the iter within the first bvec, the
iter->nr_segs is set to bvec->bv_len. nr_segs should be the number of
bvecs, plus we don't need to adjust it here, so just remove it.

Fixes: b000ae0ec2 ("io_uring/rsrc: optimise single entry advance")
Signed-off-by: Chenliang Li <cliang01.li@samsung.com>
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/20240619063819.2445-1-cliang01.li@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Roxana Nicolescu <roxana.nicolescu@canonical.com>

This commit is contained in:

Chenliang Li

2024-06-19 14:38:19 +08:00

committed by

Roxana Nicolescu

parent 66ba47084a

commit fed7a37ae2

1 changed files with 0 additions and 1 deletions

									
										io_uring/rsrc.c
									
		-1
	
												View File
												
				@@ -1105,7 +1105,6 @@ int io_import_fixed(int ddir, struct iov_iter *iter,

							 * branch doesn't expect non PAGE_SIZE'd chunks.

							 */

							iter->bvec = bvec;

							iter->nr_segs = bvec->bv_len;

							iter->count -= offset;

							iter->iov_offset = offset;

						} else {