From: Michael S. Tsirkin Date: Sun, 29 Nov 2009 15:52:00 +0000 (+0200) Subject: virtio: set pci bus master enable bit X-Git-Tag: upstream/snapshot3+hdmi~15318^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=bc505f373979692d51a86d40925f77a8b09d17b9;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git 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 Signed-off-by: Michael S. Tsirkin --- diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c index 1b65732..625447f 100644 --- 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