linux-kernel - [PATCH v2 2/2] drm/virtio: fix mmap page attributes

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Date:   Wed, 11 Dec 2019 09:18:10 +0100
From:   Gerd Hoffmann <kraxel@...hat.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     gurchetansingh@...omium.org, Gerd Hoffmann <kraxel@...hat.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        virtualization@...ts.linux-foundation.org (open list:VIRTIO GPU DRIVER),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2 2/2] drm/virtio: fix mmap page attributes

virtio-gpu uses cached mappings, set shmem->caching accordingly.

Reported-by: Gurchetan Singh <gurchetansingh@...omium.org>
Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
---
 drivers/gpu/drm/virtio/virtgpu_object.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c
index 017a9e0fc3bb..a0b5e5195816 100644
--- a/drivers/gpu/drm/virtio/virtgpu_object.c
+++ b/drivers/gpu/drm/virtio/virtgpu_object.c
@@ -118,6 +118,7 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
 	shmem_obj = drm_gem_shmem_create(vgdev->ddev, params->size);
 	if (IS_ERR(shmem_obj))
 		return PTR_ERR(shmem_obj);
+	shmem_obj->caching = DRM_GEM_SHMEM_CACHED;
 	bo = gem_to_virtio_gpu_obj(&shmem_obj->base);
 
 	ret = virtio_gpu_resource_id_get(vgdev, &bo->hw_res_handle);
-- 
2.18.1