[dm-devel] [patch 01/18] bio_clone fix
akpm at osdl.org
akpm at osdl.org
Thu Jul 28 08:07:18 UTC 2005
From: Andrew Morton <akpm at osdl.org>
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 at gmail.com> for doggedly
chasing this one down.
Acked-by: Jens Axboe <axboe at suse.de>
Cc: <linux-raid at vger.kernel.org>
Cc: <dm-devel at redhat.com>
Signed-off-by: Andrew Morton <akpm at osdl.org>
---
fs/bio.c | 1 +
1 files changed, 1 insertion(+)
diff -puN fs/bio.c~bio_clone-fix fs/bio.c
--- devel/fs/bio.c~bio_clone-fix 2005-07-28 00:39:40.000000000 -0700
+++ devel-akpm/fs/bio.c 2005-07-28 01:02:34.000000000 -0700
@@ -261,6 +261,7 @@ inline void __bio_clone(struct bio *bio,
*/
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);
}
_
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