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authorMichael S. Tsirkin <mst@redhat.com>2017-03-29 19:06:20 +0300
committerMichael S. Tsirkin <mst@redhat.com>2017-04-07 16:38:59 +0300
commit404123c2db798027e852480ed9c4accef9f1d9e6 (patch)
tree07f8ecc47704cfbc7759e19d0121acf201f7e6ba /drivers/virtio
parent2e123b44a3c19de75f40ee0081d6d4fc04adfdc7 (diff)
downloadlinux-404123c2db798027e852480ed9c4accef9f1d9e6.tar.bz2
virtio: allow drivers to validate features
Some drivers can't support all features in all configurations. At the moment we blindly set FEATURES_OK and later FAILED. Support this better by adding a callback drivers can use to do some early checks. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/virtio')
-rw-r--r--drivers/virtio/virtio.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c
index 400d70b69379..48230a5e12f2 100644
--- a/drivers/virtio/virtio.c
+++ b/drivers/virtio/virtio.c
@@ -232,6 +232,12 @@ static int virtio_dev_probe(struct device *_d)
if (device_features & (1ULL << i))
__virtio_set_bit(dev, i);
+ if (drv->validate) {
+ err = drv->validate(dev);
+ if (err)
+ goto err;
+ }
+
err = virtio_finalize_features(dev);
if (err)
goto err;