This is a note to let you know that I've just added the patch titled
md/raid5: fix raid5_set_bi_hw_segments
to the 2.6.39-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
md-raid5-fix-raid5_set_bi_hw_segments.patch
and it can be found in the queue-2.6.39 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 9b2dc8b665932a8e681a7ab3237f60475e75e161 Mon Sep 17 00:00:00 2001
From: Namhyung Kim <[email protected]>
Date: Mon, 13 Jun 2011 14:48:22 +0900
Subject: md/raid5: fix raid5_set_bi_hw_segments
From: Namhyung Kim <[email protected]>
commit 9b2dc8b665932a8e681a7ab3237f60475e75e161 upstream.
The @bio->bi_phys_segments consists of active stripes count in the
lower 16 bits and processed stripes count in the upper 16 bits. So
logical-OR operator should be bitwise one.
This bug has been present since 2.6.27 and the fix is suitable for any
-stable kernel since then. Fortunately the bad code is only used on
error paths and is relatively unlikely to be hit.
Signed-off-by: Namhyung Kim <[email protected]>
Signed-off-by: NeilBrown <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/md/raid5.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -129,7 +129,7 @@ static inline int raid5_dec_bi_hw_segmen
static inline void raid5_set_bi_hw_segments(struct bio *bio, unsigned int cnt)
{
- bio->bi_phys_segments = raid5_bi_phys_segments(bio) || (cnt << 16);
+ bio->bi_phys_segments = raid5_bi_phys_segments(bio) | (cnt << 16);
}
/* Find first data disk in a raid6 stripe */
Patches currently in stable-queue which might be from [email protected] are
queue-2.6.39/md-raid5-fix-raid5_set_bi_hw_segments.patch
queue-2.6.39/md-raid5-fix-fua-request-handling-in-ops_run_io.patch
queue-2.6.39/md-check-hot_remove_disk-when-removing-disk.patch
queue-2.6.39/nbd-limit-module-parameters-to-a-sane-value.patch
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