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authorTiwei Bie <tiwei.bie@intel.com>2018-11-21 13:03:29 +0300
committerDavid S. Miller <davem@davemloft.net>2018-11-27 09:17:40 +0300
commit3a814fdf271552a5c4641f812ff7e2dd8ad09ee4 (patch)
tree42a1efcb992dc5eda98e69804d9beba7b788047a /drivers/remoteproc/remoteproc_virtio.c
parentf51f982682e2a612fa642dfee47cc8da63677148 (diff)
downloadlinux-3a814fdf271552a5c4641f812ff7e2dd8ad09ee4.tar.xz
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/remoteproc/remoteproc_virtio.c')
-rw-r--r--drivers/remoteproc/remoteproc_virtio.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/remoteproc/remoteproc_virtio.c b/drivers/remoteproc/remoteproc_virtio.c
index de21f620b882..183fc42a510a 100644
--- a/drivers/remoteproc/remoteproc_virtio.c
+++ b/drivers/remoteproc/remoteproc_virtio.c
@@ -214,6 +214,16 @@ static u64 rproc_virtio_get_features(struct virtio_device *vdev)
return rsc->dfeatures;
}
+static void rproc_transport_features(struct virtio_device *vdev)
+{
+ /*
+ * Packed ring isn't enabled on remoteproc for now,
+ * because remoteproc uses vring_new_virtqueue() which
+ * creates virtio rings on preallocated memory.
+ */
+ __virtio_clear_bit(vdev, VIRTIO_F_RING_PACKED);
+}
+
static int rproc_virtio_finalize_features(struct virtio_device *vdev)
{
struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
@@ -224,6 +234,9 @@ static int rproc_virtio_finalize_features(struct virtio_device *vdev)
/* Give virtio_ring a chance to accept features */
vring_transport_features(vdev);
+ /* Give virtio_rproc a chance to accept features. */
+ rproc_transport_features(vdev);
+
/* Make sure we don't have any features > 32 bits! */
BUG_ON((u32)vdev->features != vdev->features);