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| author | Rusty Russell <rusty@rustcorp.com.au> | 2008-07-25 12:06:13 -0500 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2008-07-25 12:06:14 +1000 |
| commit | e34f87256794b87e7f4a8f1812538be7b7b5214c (patch) | |
| tree | b91ffb6df4ac13ace269bef60ae16a1048b1fa73 /drivers/virtio/virtio_ring.c | |
| parent | c624896e488ba2bff5ae497782cfb265c8b00646 (diff) | |
virtio: Add transport feature handling stub for virtio_ring.
To prepare for virtio_ring transport feature bits, hook in a call in
all the users to manipulate them. This currently just clears all the
bits, since it doesn't understand any features.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'drivers/virtio/virtio_ring.c')
| -rw-r--r-- | drivers/virtio/virtio_ring.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 21d9a62767af..6eb5303fed11 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -18,6 +18,7 @@ */ #include <linux/virtio.h> #include <linux/virtio_ring.h> +#include <linux/virtio_config.h> #include <linux/device.h> #ifdef DEBUG @@ -323,4 +324,19 @@ void vring_del_virtqueue(struct virtqueue *vq) } EXPORT_SYMBOL_GPL(vring_del_virtqueue); +/* Manipulates transport-specific feature bits. */ +void vring_transport_features(struct virtio_device *vdev) +{ + unsigned int i; + + for (i = VIRTIO_TRANSPORT_F_START; i < VIRTIO_TRANSPORT_F_END; i++) { + switch (i) { + default: + /* We don't understand this bit. */ + clear_bit(i, vdev->features); + } + } +} +EXPORT_SYMBOL_GPL(vring_transport_features); + MODULE_LICENSE("GPL"); |