[PATCH] md: correct "working_disk" counts for raid5 and raid6

This error only affects two message (and sysadmin heart-rate).  It does not
risk data.
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/md/raid5.c

@@ -477,8 +477,8 @@ static void error(mddev_t *mddev, mdk_rdev_t *rdev)
 
 	if (!rdev->faulty) {
 		mddev->sb_dirty = 1;
-		conf->working_disks--;
 		if (rdev->in_sync) {
+			conf->working_disks--;
 			mddev->degraded++;
 			conf->failed_disks++;
 			rdev->in_sync = 0;

drivers/md/raid6main.c

@@ -498,8 +498,8 @@ static void error(mddev_t *mddev, mdk_rdev_t *rdev)
 
 	if (!rdev->faulty) {
 		mddev->sb_dirty = 1;
-		conf->working_disks--;
 		if (rdev->in_sync) {
+			conf->working_disks--;
 			mddev->degraded++;
 			conf->failed_disks++;
 			rdev->in_sync = 0;