[PATCH 1/3] raid5: Add per-stripe lock on toread in func

["Jianpeng Ma" <majianpeng@xxxxxxxxx>]

Commit b17459c05000fdbe8 introduce per-stripe lock,but it omit this
place.

Signed-off-by: Jianpeng Ma <majianpeng@xxxxxxxxx>
---
 drivers/md/raid5.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 7031b86..dd73209 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -2523,8 +2523,10 @@ handle_failed_stripe(struct r5conf *conf, struct stripe_head *sh,
 		if (!test_bit(R5_Wantfill, &sh->dev[i].flags) &&
 		    (!test_bit(R5_Insync, &sh->dev[i].flags) ||
 		      test_bit(R5_ReadError, &sh->dev[i].flags))) {
+			spin_lock_irq(&sh->stripe_lock);
 			bi = sh->dev[i].toread;
 			sh->dev[i].toread = NULL;
+			spin_unlock_irq(&sh->stripe_lock);
 			if (test_and_clear_bit(R5_Overlap, &sh->dev[i].flags))
 				wake_up(&conf->wait_for_overlap);
 			if (bi) s->to_read--;
-- 
1.7.9.5
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