linux-kernel - [PATCH] virtio: set pci bus master enable bit

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Message-ID: <20091129155200.GA6667@redhat.com>
Date:	Sun, 29 Nov 2009 17:52:01 +0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Rusty Russell <rusty@...tcorp.com.au>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Mark McLoughlin <markmc@...hat.com>,
	linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org,
	Anthony Liguori <anthony@...emonkey.ws>, kvm@...r.kernel.org,
	Yan Vugenfirer <yvugenfi@...hat.com>
Subject: [PATCH] virtio: set pci bus master enable bit

As all virtio devices perform DMA, we
must enable bus mastering for them to be
spec compliant.

Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
---
 drivers/virtio/virtio_pci.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c
index 28d9cf7..717bae1 100644
--- a/drivers/virtio/virtio_pci.c
+++ b/drivers/virtio/virtio_pci.c
@@ -648,6 +648,7 @@ 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
-- 
1.6.5.2.143.g8cc62
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