Commit a5453be4 authored Jul 28, 2005 by Andrew Morton Committed by Linus Torvalds Jul 28, 2005

[PATCH] bio_clone fix

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>

parent 577a4f81

fs/bio.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -261,6 +261,7 @@ inline void __bio_clone(struct bio bio, struct bio bio_src)
		*/
		bio->bi_vcnt = bio_src->bi_vcnt;
		bio->bi_size = bio_src->bi_size;
		bio->bi_idx = bio_src->bi_idx;
		bio_phys_segments(q, bio);
		bio_hw_segments(q, bio);
		}