diff --git a/[refs] b/[refs]
index 42e0c647341e..0adcf70c8f04 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e602878fd89dab0af2af995a6bef0fbe97b20dc8
+refs/heads/master: 377b8fc6d70aab90ccfc053630c65835defbc3f8
diff --git a/trunk/drivers/block/mtip32xx/mtip32xx.c b/trunk/drivers/block/mtip32xx/mtip32xx.c
index cd271d5e1b73..29735316730a 100644
--- a/trunk/drivers/block/mtip32xx/mtip32xx.c
+++ b/trunk/drivers/block/mtip32xx/mtip32xx.c
@@ -970,6 +970,8 @@ static inline void mtip_process_sdbf(struct driver_data *dd)
 	/* walk all bits in all slot groups */
 	for (group = 0; group < dd->slot_groups; group++) {
 		completed = readl(port->completed[group]);
+		if (!completed)
+			continue;
 
 		/* clear completed status register in the hardware.*/
 		writel(completed, port->completed[group]);