[media] videobuf: fix sparse warnings

videobuf-core.c:834:23: warning: Using plain integer as NULL pointer
videobuf-core.c:851:28: warning: Using plain integer as NULL pointer

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/media/v4l2-core/videobuf-core.c b/drivers/media/v4l2-core/videobuf-core.c
index b91a266d0b7e..926836d1813a 100644
--- a/drivers/media/v4l2-core/videobuf-core.c
+++ b/drivers/media/v4l2-core/videobuf-core.c
@@ -51,6 +51,8 @@ MODULE_LICENSE("GPL");
 
 #define CALL(q, f, arg...)                                              \
         ((q->int_ops->f) ? q->int_ops->f(arg) : 0)
+#define CALLPTR(q, f, arg...)                                           \
+        ((q->int_ops->f) ? q->int_ops->f(arg) : NULL)
 
 struct videobuf_buffer *videobuf_alloc_vb(struct videobuf_queue *q)
 {
@@ -831,7 +833,7 @@ static int __videobuf_copy_to_user(struct videobuf_queue *q,
                                    char __user *data, size_t count,
                                    int nonblocking)
 {
-        void *vaddr = CALL(q, vaddr, buf);
+        void *vaddr = CALLPTR(q, vaddr, buf);
 
         /* copy to userspace */
         if (count > buf->size - q->read_off)
@@ -848,7 +850,7 @@ static int __videobuf_copy_stream(struct videobuf_queue *q,
                                   char __user *data, size_t count, size_t pos,
                                   int vbihack, int nonblocking)
 {
-        unsigned int *fc = CALL(q, vaddr, buf);
+        unsigned int *fc = CALLPTR(q, vaddr, buf);
 
         if (vbihack) {
                 /* dirty, undocumented hack -- pass the frame counter