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| author | Tiwei Bie <tiwei.bie@intel.com> | 2018-11-21 18:03:29 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-11-26 22:17:40 -0800 |
| commit | 3a814fdf271552a5c4641f812ff7e2dd8ad09ee4 (patch) | |
| tree | 42a1efcb992dc5eda98e69804d9beba7b788047a /drivers/misc/mic | |
| parent | f51f982682e2a612fa642dfee47cc8da63677148 (diff) | |
| download | linux-3a814fdf271552a5c4641f812ff7e2dd8ad09ee4.tar.bz2 | |
virtio_ring: disable packed ring on unsupported transports
Currently, ccw, vop and remoteproc need some legacy virtio
APIs to create or access virtio rings, which are not supported
by packed ring. So disable packed ring on these transports
for now.
Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/misc/mic')
| -rw-r--r-- | drivers/misc/mic/vop/vop_main.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/misc/mic/vop/vop_main.c b/drivers/misc/mic/vop/vop_main.c index 3633202e18f4..6b212c8b78e7 100644 --- a/drivers/misc/mic/vop/vop_main.c +++ b/drivers/misc/mic/vop/vop_main.c @@ -129,6 +129,16 @@ static u64 vop_get_features(struct virtio_device *vdev) return features; } +static void vop_transport_features(struct virtio_device *vdev) +{ + /* + * Packed ring isn't enabled on virtio_vop for now, + * because virtio_vop uses vring_new_virtqueue() which + * creates virtio rings on preallocated memory. + */ + __virtio_clear_bit(vdev, VIRTIO_F_RING_PACKED); +} + static int vop_finalize_features(struct virtio_device *vdev) { unsigned int i, bits; @@ -141,6 +151,9 @@ static int vop_finalize_features(struct virtio_device *vdev) /* Give virtio_ring a chance to accept features. */ vring_transport_features(vdev); + /* Give virtio_vop a chance to accept features. */ + vop_transport_features(vdev); + memset_io(out_features, 0, feature_len); bits = min_t(unsigned, feature_len, sizeof(vdev->features)) * 8; |