--- a/drivers/bcma/driver_mips.c
+++ b/drivers/bcma/driver_mips.c
@@ -75,11 +75,16 @@ static u32 bcma_core_mips_irqflag(struct
 		return dev->core_index;
 	flag = bcma_aread32(dev, BCMA_MIPS_OOBSELOUTA30);
 
-	return flag & 0x1F;
+	if (flag)
+		return flag & 0x1F;
+	else
+		return 0x3f;
 }
 
 /* Get the MIPS IRQ assignment for a specified device.
  * If unassigned, 0 is returned.
+ * If disabled, 5 is returned.
+ * If not supported, 6 is returned.
  */
 unsigned int bcma_core_mips_irq(struct bcma_device *dev)
 {
@@ -88,13 +93,18 @@ unsigned int bcma_core_mips_irq(struct b
 	unsigned int irq;
 
 	irqflag = bcma_core_mips_irqflag(dev);
+	if (irqflag == 0x3f)
+		return 6;
 
 	for (irq = 1; irq <= 4; irq++)
 		if (bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(irq)) &
 		    (1 << irqflag))
 			return irq;
 
-	return 0;
+	if ((1 << irqflag) & bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0)))
+		return 0;
+
+	return 5;
 }
 EXPORT_SYMBOL(bcma_core_mips_irq);
 
@@ -115,7 +125,7 @@ static void bcma_core_mips_set_irq(struc
 		bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0),
 			    bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0)) &
 			    ~(1 << irqflag));
-	else
+	else if (oldirq != 5)
 		bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(oldirq), 0);
 
 	/* assign the new one */