media: touchscreen: sur40: Stop direct calls to queue num_buffers field

Use vb2_get_num_buffers() to avoid using queue num_buffers field directly.
This allows us to change how the number of buffers is computed in the
future.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Reviewed-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
index 8ddb3f7d307aa484907d175559a1b90d6af8771c..e7d2a52169a050b4d46f049117271dfb33c29f30 100644 (file)
--- a/drivers/input/touchscreen/sur40.c
+++ b/drivers/input/touchscreen/sur40.c
@@ -847,9 +847,10 @@ static int sur40_queue_setup(struct vb2_queue *q,
                       unsigned int sizes[], struct device *alloc_devs[])
 {
        struct sur40_state *sur40 = vb2_get_drv_priv(q);
+       unsigned int q_num_bufs = vb2_get_num_buffers(q);
 
-       if (q->num_buffers + *nbuffers < 3)
-               *nbuffers = 3 - q->num_buffers;
+       if (q_num_bufs + *nbuffers < 3)
+               *nbuffers = 3 - q_num_bufs;
 
        if (*nplanes)
                return sizes[0] < sur40->pix_fmt.sizeimage ? -EINVAL : 0;