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authorMichael S. Tsirkin <mst@redhat.com>2009-11-29 17:52:00 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2011-03-07 15:17:55 -0800
commitd09706f85cda0c49b345b90df6d6350db7d6f9c4 (patch)
treee59359c5d6ff3c5072fe4bece324a4309118366f
parentd96cb2c94c9ad41a97ca3f295b25881b96899614 (diff)
downloadlwn-d09706f85cda0c49b345b90df6d6350db7d6f9c4.tar.gz
lwn-d09706f85cda0c49b345b90df6d6350db7d6f9c4.zip
virtio: set pci bus master enable bit
commit bc505f373979692d51a86d40925f77a8b09d17b9 upstream. 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> Cc: maximilian attems <max@stro.at> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/virtio/virtio_pci.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c
index 5fed28387b3f..d10c85764ee3 100644
--- a/drivers/virtio/virtio_pci.c
+++ b/drivers/virtio/virtio_pci.c
@@ -647,6 +647,7 @@ 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