[PATCH 4/5] misc: vop: set VIRTIO_F_ACCESS_PLATFORM for nocoherent platform

[Sherry Sun]

Set VIRTIO_F_ACCESS_PLATFORM feature for nocoherent platform, since
it needs the DMA API for virtio.

Signed-off-by: Sherry Sun <sherry.sun@xxxxxxx>
Signed-off-by: Joakim Zhang <qiangqing.zhang@xxxxxxx>
---
 drivers/misc/mic/vop/vop_main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/misc/mic/vop/vop_main.c b/drivers/misc/mic/vop/vop_main.c
index d3645122c983..d609f0dc6124 100644
--- a/drivers/misc/mic/vop/vop_main.c
+++ b/drivers/misc/mic/vop/vop_main.c
@@ -125,6 +125,9 @@ static void vop_transport_features(struct virtio_device *vdev)
 	 * creates virtio rings on preallocated memory.
 	 */
 	__virtio_clear_bit(vdev, VIRTIO_F_RING_PACKED);
+
+	if (!dev_is_dma_coherent(vdev->dev.parent))
+		__virtio_set_bit(vdev, VIRTIO_F_ACCESS_PLATFORM);
 }
 
 static int vop_finalize_features(struct virtio_device *vdev)
-- 
2.17.1