virtio: set pci bus master enable bit

As all virtio devices perform DMA, we must enable bus mastering for them to be spec compliant. This patch fixes hotplug of virtio devices with Linux guests and qemu 0.11-0.12. Tested-by: Alexander Graf <[email protected]> Signed-off-by: Michael S. Tsirkin <[email protected]>
iegor · Mar 2, 2010 · bc505f3 · bc505f3
1 parent 3119815
commit bc505f3
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c
@@ -649,6 +649,7 @@ static int __devinit virtio_pci_probe(struct pci_dev *pci_dev,
 		goto out_req_regions;
 
 	pci_set_drvdata(pci_dev, vp_dev);
+	pci_set_master(pci_dev);
 
 	/* we use the subsystem vendor/device id as the virtio vendor/device
 	 * id.  this allows us to use the same PCI vendor/device id for all