[media] DaVinci-VPBE: Use kmalloc_array() in vpbe_initialize()

* A multiplication for the size determination of a memory allocation
  indicated that an array data structure should be processed.
  Thus use the corresponding function "kmalloc_array".

  This issue was detected by using the Coccinelle software.

* Replace the specification of a data type by a pointer dereference
  to make the corresponding size determination a bit safer according to
  the Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/drivers/media/platform/davinci/vpbe.c b/drivers/media/platform/davinci/vpbe.c
index 7d26707..785d6cf 100644 (file)
--- a/drivers/media/platform/davinci/vpbe.c
+++ b/drivers/media/platform/davinci/vpbe.c
@@ -676,9 +676,9 @@ static int vpbe_initialize(struct device *dev, struct vpbe_device *vpbe_dev)
         * store venc sd index.
         */
        num_encoders = vpbe_dev->cfg->num_ext_encoders + 1;
-       vpbe_dev->encoders = kmalloc(
-                               sizeof(struct v4l2_subdev *)*num_encoders,
-                               GFP_KERNEL);
+       vpbe_dev->encoders = kmalloc_array(num_encoders,
+                                          sizeof(*vpbe_dev->encoders),
+                                          GFP_KERNEL);
        if (NULL == vpbe_dev->encoders) {
                v4l2_err(&vpbe_dev->v4l2_dev,
                        "unable to allocate memory for encoders sub devices");