[PATCH v2 24/25] drm/xen: Compute dumb-buffer sizes with drm_mode_size_dumb()

[Thomas Zimmermann <tzimmermann@xxxxxxx>]

Call drm_mode_size_dumb() to compute dumb-buffer scanline pitch
and buffer size. Align the pitch to a multiple of 8.

Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Cc: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>
---
 drivers/gpu/drm/xen/xen_drm_front.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/xen/xen_drm_front.c 
b/drivers/gpu/drm/xen/xen_drm_front.c
index 1bda7ef606cc..fd2f250fbc33 100644
--- a/drivers/gpu/drm/xen/xen_drm_front.c
+++ b/drivers/gpu/drm/xen/xen_drm_front.c
@@ -14,6 +14,7 @@
 
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_drv.h>
+#include <drm/drm_dumb_buffers.h>
 #include <drm/drm_ioctl.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_file.h>
@@ -414,8 +415,10 @@ static int xen_drm_drv_dumb_create(struct drm_file *filp,
         * object without pages etc.
         * For details also see drm_gem_handle_create
         */
-       args->pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
-       args->size = args->pitch * args->height;
+
+       ret = drm_mode_size_dumb(dev, args, SZ_8, 0);
+       if (ret)
+               return ret;
 
        obj = xen_drm_front_gem_create(dev, args->size);
        if (IS_ERR(obj)) {
-- 
2.47.1