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virtio: set pci bus master enable bit

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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 <agraf@suse.de>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2009-11-29 17:52:00 +02:00
parent 3119815912
commit bc505f3739
1 changed files with 1 additions and 0 deletions
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1
drivers/virtio/virtio_pci.c
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@ -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