[media] DaVinci-VPIF-Display: Use kcalloc() in vpif_probe()

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

  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/vpif_display.c b/drivers/media/platform/davinci/vpif_display.c
index 6b3ea1e..0faab86 100644 (file)
--- a/drivers/media/platform/davinci/vpif_display.c
+++ b/drivers/media/platform/davinci/vpif_display.c
@@ -1274,8 +1274,7 @@ static __init int vpif_probe(struct platform_device *pdev)
        vpif_obj.config = pdev->dev.platform_data;
        subdev_count = vpif_obj.config->subdev_count;
        subdevdata = vpif_obj.config->subdevinfo;
-       vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
-                                                               GFP_KERNEL);
+       vpif_obj.sd = kcalloc(subdev_count, sizeof(*vpif_obj.sd), GFP_KERNEL);
        if (vpif_obj.sd == NULL) {
                vpif_err("unable to allocate memory for subdevice pointers\n");
                err = -ENOMEM;