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

Signed-off-by: Kusanagi Kouichi <slash@ac.auone-net.jp>
Signed-off-by: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/media/video/cx23885/cx23885-core.c b/drivers/media/video/cx23885/cx23885-core.c
index 161ae7316c95..ff76f64edac1 100644
--- a/drivers/media/video/cx23885/cx23885-core.c
+++ b/drivers/media/video/cx23885/cx23885-core.c
@@ -1953,8 +1953,12 @@ static int __devinit cx23885_initdev(struct pci_dev *pci_dev,
                 goto fail_irq;
         }
 
-        err = request_irq(pci_dev->irq, cx23885_irq,
-                          IRQF_SHARED | IRQF_DISABLED, dev->name, dev);
+        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) {
                 printk(KERN_ERR "%s: can't get IRQ %d\n",
                        dev->name, pci_dev->irq);
@@ -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);