[SCSI QLOGICFC]: Update for irqreturn_t.

drivers/scsi/qlogicfc.c

@@ -660,7 +660,7 @@ static int isp2x00_reset_hardware(struct Scsi_Host *);
 static int isp2x00_mbox_command(struct Scsi_Host *, u_short[]);
 static int isp2x00_return_status(Scsi_Cmnd *, struct Status_Entry *);
 static void isp2x00_intr_handler(int, void *, struct pt_regs *);
-static void do_isp2x00_intr_handler(int, void *, struct pt_regs *);
+static irqreturn_t do_isp2x00_intr_handler(int, void *, struct pt_regs *);
 static int isp2x00_make_portdb(struct Scsi_Host *);
 
 #if ISP2x00_FABRIC
@@ -1421,7 +1421,7 @@ static void redo_port_db(unsigned long arg)
 
 #define ASYNC_EVENT_INTERRUPT	0x01
 
-void do_isp2x00_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
+irqreturn_t do_isp2x00_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
 {
 	struct Scsi_Host *host = dev_id;
 	unsigned long flags;
@@ -1429,6 +1429,8 @@ void do_isp2x00_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
 	spin_lock_irqsave(host->host_lock, flags);
 	isp2x00_intr_handler(irq, dev_id, regs);
 	spin_unlock_irqrestore(host->host_lock, flags);
+
+	return IRQ_HANDLED;
 }
 
 void isp2x00_intr_handler(int irq, void *dev_id, struct pt_regs *regs)