Messages in this thread Patch in this message | | | Date | Wed, 14 Jan 2015 19:27:28 +0200 | From | "Michael S. Tsirkin" <> | Subject | [PATCH v3 02/16] virtio/9p: verify device has config space |
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Some devices might not implement config space access (e.g. remoteproc used not to - before 3.9). virtio/9p needs config space access so make it fail gracefully if not there.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com> --- net/9p/trans_virtio.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c index daa749c..d8e376a 100644 --- a/net/9p/trans_virtio.c +++ b/net/9p/trans_virtio.c @@ -524,6 +524,12 @@ static int p9_virtio_probe(struct virtio_device *vdev) int err; struct virtio_chan *chan; + if (!vdev->config->get) { + dev_err(&vdev->dev, "%s failure: config access disabled\n", + __func__); + return -EINVAL; + } + chan = kmalloc(sizeof(struct virtio_chan), GFP_KERNEL); if (!chan) { pr_err("Failed to allocate virtio 9P channel\n"); -- MST
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