media: vimc: initialize vim entity pointers to NULL

since NULL value for vimc entity pointer indicates
that entity creation failed and this is tested, the
pointers should be initialized to NULL.
Signed-off-by: NDafna Hirschfeld <dafna.hirschfeld@collabora.com>
Acked-by: NHelen Koike <helen.koike@collabora.com>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/vimc/vimc-core.c

@@ -199,9 +199,8 @@ static int vimc_register_devices(struct vimc_device *vimc)
 	}
 
 	/* allocate ent_devs */
-	vimc->ent_devs = kmalloc_array(vimc->pipe_cfg->num_ents,
-				       sizeof(*vimc->ent_devs),
-				       GFP_KERNEL);
+	vimc->ent_devs = kcalloc(vimc->pipe_cfg->num_ents,
+				 sizeof(*vimc->ent_devs), GFP_KERNEL);
 	if (!vimc->ent_devs) {
 		ret = -ENOMEM;
 		goto err_v4l2_unregister;