[PATCH 4/5] drm/gem-shmem: Use aligned default pitch and size for dumb buffers

[Thomas Zimmermann]

Use the pitch and size values stored in the args parameter for
allocating a dumb buffer in drm_gem_shmem_dumb_create(). The values
come from drm_mode_create_dumb(). Align the pitch to a multiple of 8.

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
---
 drivers/gpu/drm/drm_gem_shmem_helper.c | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
index 8508060a1a95..630a4fad7af1 100644
--- a/drivers/gpu/drm/drm_gem_shmem_helper.c
+++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
@@ -18,6 +18,7 @@
 #include <drm/drm.h>
 #include <drm/drm_device.h>
 #include <drm/drm_drv.h>
+#include <drm/drm_dumb_buffers.h>
 #include <drm/drm_gem_shmem_helper.h>
 #include <drm/drm_prime.h>
 #include <drm/drm_print.h>
@@ -514,18 +515,11 @@ EXPORT_SYMBOL(drm_gem_shmem_purge);
 int drm_gem_shmem_dumb_create(struct drm_file *file, struct drm_device *dev,
 			      struct drm_mode_create_dumb *args)
 {
-	u32 min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
+	int ret;
 
-	if (!args->pitch || !args->size) {
-		args->pitch = min_pitch;
-		args->size = PAGE_ALIGN(args->pitch * args->height);
-	} else {
-		/* ensure sane minimum values */
-		if (args->pitch < min_pitch)
-			args->pitch = min_pitch;
-		if (args->size < args->pitch * args->height)
-			args->size = PAGE_ALIGN(args->pitch * args->height);
-	}
+	ret = drm_mode_align_dumb(args, 8, 0);
+	if (ret)
+		return ret;
 
 	return drm_gem_shmem_create_with_handle(file, dev, args->size, &args->handle);
 }
-- 
2.47.0