[PATCH] md: fix locking problem in r5/r6

bitmap_unplug actually writes data (bits) to storage, so we shouldn't be holding a spinlock... Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
git-mirror · Nov 28, 2005 · 700e432 · 700e432
1 parent 22dfdf5
commit 700e432
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diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
@@ -1704,7 +1704,9 @@ static void raid5d (mddev_t *mddev)
 
 		if (conf->seq_flush - conf->seq_write > 0) {
 			int seq = conf->seq_flush;
+			spin_unlock_irq(&conf->device_lock);
 			bitmap_unplug(mddev->bitmap);
+			spin_lock_irq(&conf->device_lock);
 			conf->seq_write = seq;
 			activate_bit_delay(conf);
 		}

diff --git a/drivers/md/raid6main.c b/drivers/md/raid6main.c
@@ -1784,7 +1784,9 @@ static void raid6d (mddev_t *mddev)
 
 		if (conf->seq_flush - conf->seq_write > 0) {
 			int seq = conf->seq_flush;
+			spin_unlock_irq(&conf->device_lock);
 			bitmap_unplug(mddev->bitmap);
+			spin_lock_irq(&conf->device_lock);
 			conf->seq_write = seq;
 			activate_bit_delay(conf);
 		}