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

[ 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>
This commit is contained in:
Chenliang Li 2024-06-19 14:38:19 +08:00 committed by Greg Kroah-Hartman
parent 87e0621a6b
commit 2a215410cf
1 changed files with 0 additions and 1 deletions
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io_uring/rsrc.c
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@ -1108,7 +1108,6 @@ int io_import_fixed(int ddir, struct iov_iter *iter,
* branch doesn't expect non PAGE_SIZE'd chunks. * branch doesn't expect non PAGE_SIZE'd chunks.
*/ */
iter->bvec = bvec; iter->bvec = bvec;
iter->nr_segs = bvec->bv_len;
iter->count -= offset; iter->count -= offset;
iter->iov_offset = offset; iter->iov_offset = offset;
} else { } else {