diff --git a/ddbridge/ddbridge-core.c b/ddbridge/ddbridge-core.c
index ba21e71..0301e8e 100644
--- a/ddbridge/ddbridge-core.c
+++ b/ddbridge/ddbridge-core.c
@@ -3217,11 +3217,11 @@ static irqreturn_t irq_handler0(int irq, void *dev_id)
 	u32 s = ddbreadl(dev, INTERRUPT_STATUS);
 
 	do {
-		if (s == 0xffffffff)
+		if (s & 0x80000000)
 			return IRQ_NONE;
 		if (!(s & 0xfff00))
 			return IRQ_NONE;
-		ddbwritel(dev, s, INTERRUPT_ACK);
+		ddbwritel(dev, s & 0xfff00, INTERRUPT_ACK);
 		irq_handle_io(dev, s);
 	} while ((s = ddbreadl(dev, INTERRUPT_STATUS)));
 
@@ -3238,7 +3238,7 @@ static irqreturn_t irq_handler1(int irq, void *dev_id)
 			return IRQ_NONE;
 		if (!(s & 0x0000f))
 			return IRQ_NONE;
-		ddbwritel(dev, s, INTERRUPT_ACK);
+		ddbwritel(dev, s & 0x0000f, INTERRUPT_ACK);
 		irq_handle_msg(dev, s);
 	} while ((s = ddbreadl(dev, INTERRUPT_STATUS)));
 
diff --git a/ddbridge/ddbridge.c b/ddbridge/ddbridge.c
index c356e71..8a4c9a2 100644
--- a/ddbridge/ddbridge.c
+++ b/ddbridge/ddbridge.c
@@ -175,7 +175,7 @@ static int __devinit ddb_probe(struct pci_dev *pdev,
 #else
 		stat = pci_enable_msi_block(dev->pdev, 2);
 		if (stat == 0) {
-			dev->msi = 1;
+			dev->msi = 2;
 			pr_info("DDBridge: using 2 MSI interrupts\n");
 		}
 		if (stat == 1)