diff --git a/drivers/firewire/core.h b/drivers/firewire/core.h
index fb03213..b2a7b65 100644
--- a/drivers/firewire/core.h
+++ b/drivers/firewire/core.h
@@ -28,6 +28,7 @@
 #define PHY_CONTENDER		0x40
 #define PHY_BUS_RESET		0x40
 #define PHY_BUS_SHORT_RESET	0x40
+#define PHY_INT_STATUS_BITS	0x3c
 
 #define BANDWIDTH_AVAILABLE_INITIAL	4915
 #define BROADCAST_CHANNEL_INITIAL	(1 << 31 | 31)
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index 8ebccda..525848f 100644
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -490,6 +490,13 @@
 	if (err < 0)
 		return err;
 
+	/*
+	 * The interrupt status bits are cleared by writing a one bit.
+	 * Avoid clearing them unless explicitly requested in set_bits.
+	 */
+	if (addr == 5)
+		clear_bits |= PHY_INT_STATUS_BITS;
+
 	old = (old & ~clear_bits) | set_bits;
 	reg_write(ohci, OHCI1394_PhyControl,
 		  OHCI1394_PhyControl_Write(addr, old));