V4L/DVB: cx23885: Enable Message Signaled Interrupts(MSI)

Signed-off-by: NKusanagi Kouichi <slash@ac.auone-net.jp>
Signed-off-by: NSteven Toth <stoth@kernellabs.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/cx23885/cx23885-core.c

@@ -1953,6 +1953,10 @@ static int __devinit cx23885_initdev(struct pci_dev *pci_dev,
 		goto fail_irq;
 	}
 
+	if (!pci_enable_msi(pci_dev))
+		err = request_irq(pci_dev->irq, cx23885_irq,
+				  IRQF_DISABLED, dev->name, dev);
+	else
 		err = request_irq(pci_dev->irq, cx23885_irq,
 				  IRQF_SHARED | IRQF_DISABLED, dev->name, dev);
 	if (err < 0) {
@@ -2000,6 +2004,7 @@ static void __devexit cx23885_finidev(struct pci_dev *pci_dev)
 
 	/* unregister stuff */
 	free_irq(pci_dev->irq, dev);
+	pci_disable_msi(pci_dev);
 
 	cx23885_dev_unregister(dev);
 	v4l2_device_unregister(v4l2_dev);