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

JIRA: https://issues.redhat.com/browse/RHEL-64867

commit a23800f08a60787dfbf2b87b2e6ed411cb629859
Author: Chenliang Li <cliang01.li@samsung.com>
Date:   Wed Jun 19 14:38:19 2024 +0800

    io_uring/rsrc: fix incorrect assignment of iter->nr_segs in io_import_fixed
    
    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: b000ae0ec2d7 ("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: Jeff Moyer <jmoyer@redhat.com>
This commit is contained in:
Jeff Moyer 2024-06-19 14:38:19 +08:00
parent 1ce2f660e0
commit b218c43f0f
1 changed files with 0 additions and 1 deletions
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io_uring/rsrc.c
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@ -1068,7 +1068,6 @@ 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 {