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[PATCH] bio_clone fix

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Fix bug introduced in 2.6.11-rc2: when we clone a BIO we need to copy over the
current index into it as well.

It corrupts data with some MD setups.

See http://bugzilla.kernel.org/show_bug.cgi?id=4946

Huuuuuuuuge thanks to Matthew Stapleton <matthew4196@gmail.com> for doggedly
chasing this one down.

Acked-by: Jens Axboe <axboe@suse.de>
Cc: <linux-raid@vger.kernel.org>
Cc: <dm-devel@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andrew Morton
2005-07-28 01:07:18 -07:00
committed by Linus Torvalds
parent 577a4f8102
commit a5453be48e
1 changed files with 1 additions and 0 deletions
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fs/bio.c
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@@ -261,6 +261,7 @@ inline void __bio_clone(struct bio *bio, struct bio *bio_src)
*/ */
bio->bi_vcnt = bio_src->bi_vcnt; bio->bi_vcnt = bio_src->bi_vcnt;
bio->bi_size = bio_src->bi_size; bio->bi_size = bio_src->bi_size;
bio->bi_idx = bio_src->bi_idx;
bio_phys_segments(q, bio); bio_phys_segments(q, bio);
bio_hw_segments(q, bio); bio_hw_segments(q, bio);
} }