[media] v4l2-dev: G_PARM was incorrectly enabled for all video nodes

G_PARM should only be enabled if:

- vidioc_g_parm is present
- or: it is a video node and vidioc_g_std or tvnorms are set.

Without this additional check v4l2-compliance would complain about
being able to use g_parm when it didn't expect it.

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

diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c
index af70f93..1b2f1c5 100644 (file)
--- a/drivers/media/video/v4l2-dev.c
+++ b/drivers/media/video/v4l2-dev.c
@@ -697,7 +697,8 @@ static void determine_valid_ioctls(struct video_device *vdev)
        SET_VALID_IOCTL(ops, VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd);
        SET_VALID_IOCTL(ops, VIDIOC_DECODER_CMD, vidioc_decoder_cmd);
        SET_VALID_IOCTL(ops, VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd);
-       if (ops->vidioc_g_parm || vdev->vfl_type == VFL_TYPE_GRABBER)
+       if (ops->vidioc_g_parm || (vdev->vfl_type == VFL_TYPE_GRABBER &&
+                                       (ops->vidioc_g_std || vdev->tvnorms)))
                set_bit(_IOC_NR(VIDIOC_G_PARM), valid_ioctls);
        SET_VALID_IOCTL(ops, VIDIOC_S_PARM, vidioc_s_parm);
        SET_VALID_IOCTL(ops, VIDIOC_G_TUNER, vidioc_g_tuner);