diff options
Diffstat (limited to 'drivers/virtio')
| -rw-r--r-- | drivers/virtio/virtio.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c index 9248125..3e78f4b 100644 --- a/drivers/virtio/virtio.c +++ b/drivers/virtio/virtio.c @@ -160,6 +160,7 @@ static int virtio_dev_probe(struct device *_d) struct virtio_device *dev = dev_to_virtio(_d); struct virtio_driver *drv = drv_to_virtio(dev->dev.driver); u64 device_features; + u64 driver_features; unsigned status; /* We have a driver! */ @@ -168,15 +169,16 @@ static int virtio_dev_probe(struct device *_d) /* Figure out what features the device supports. */ device_features = dev->config->get_features(dev); - /* Features supported by both device and driver into dev->features. */ - dev->features = 0; + /* Figure out what features the driver supports. */ + driver_features = 0; for (i = 0; i < drv->feature_table_size; i++) { unsigned int f = drv->feature_table[i]; BUG_ON(f >= 64); - if (device_features & (1ULL << f)) - __virtio_set_bit(dev, f); + driver_features |= (1ULL << f); } + dev->features = driver_features & device_features; + /* Transport features always preserved to pass to finalize_features. */ for (i = VIRTIO_TRANSPORT_F_START; i < VIRTIO_TRANSPORT_F_END; i++) if (device_features & (1ULL << i)) |
