From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: [PATCH v3 05/16] virtio/net: verify device has config space Date: Wed, 14 Jan 2015 19:27:39 +0200 Message-ID: <1421256142-11512-6-git-send-email-mst@redhat.com> References: <1421256142-11512-1-git-send-email-mst@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Rusty Russell , cornelia.huck@de.ibm.com, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org To: linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org Return-path: Content-Disposition: inline In-Reply-To: <1421256142-11512-1-git-send-email-mst@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Some devices might not implement config space access (e.g. remoteproc used not to - before 3.9). virtio/net needs config space access so make it fail gracefully if not there. Signed-off-by: Michael S. Tsirkin --- drivers/net/virtio_net.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 5ca9771..9bc1072 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -1713,6 +1713,12 @@ static int virtnet_probe(struct virtio_device *vdev) struct virtnet_info *vi; u16 max_queue_pairs; + if (!vdev->config->get) { + dev_err(&vdev->dev, "%s failure: config access disabled\n", + __func__); + return -EINVAL; + } + if (!virtnet_validate_features(vdev)) return -EINVAL; -- MST