[PATCH v2 21/25] drm/virtio: Compute dumb-buffer sizes with drm_mode_size_dumb()

[Thomas Zimmermann]

Call drm_mode_size_dumb() to compute dumb-buffer scanline pitch and
buffer size. Align the pitch to a multiple of 4.

Signed-off-by: Thomas Zimmermann <tzimmerm...@suse.de>
Cc: David Airlie <airl...@redhat.com>
Cc: Gerd Hoffmann <kra...@redhat.com>
Cc: Gurchetan Singh <gurchetansi...@chromium.org>
Cc: Chia-I Wu <olva...@gmail.com>
---
 drivers/gpu/drm/virtio/virtgpu_gem.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_gem.c 
b/drivers/gpu/drm/virtio/virtgpu_gem.c
index 5aab588fc400..22cf1cd2fdfd 100644
--- a/drivers/gpu/drm/virtio/virtgpu_gem.c
+++ b/drivers/gpu/drm/virtio/virtgpu_gem.c
@@ -23,6 +23,7 @@
  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
+#include <drm/drm_dumb_buffers.h>
 #include <drm/drm_file.h>
 #include <drm/drm_fourcc.h>
 
@@ -66,15 +67,14 @@ int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
        struct virtio_gpu_object_params params = { 0 };
        struct virtio_gpu_device *vgdev = dev->dev_private;
        int ret;
-       uint32_t pitch;
+
+       ret = drm_mode_size_dumb(dev, args, SZ_4, 0);
+       if (ret)
+               return ret;
 
        if (args->bpp != 32)
                return -EINVAL;
 
-       pitch = args->width * 4;
-       args->size = pitch * args->height;
-       args->size = ALIGN(args->size, PAGE_SIZE);
-
        params.format = virtio_gpu_translate_format(DRM_FORMAT_HOST_XRGB8888);
        params.width = args->width;
        params.height = args->height;
@@ -92,7 +92,6 @@ int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
        if (ret)
                goto fail;
 
-       args->pitch = pitch;
        return ret;
 
 fail:
-- 
2.47.1