V4L/DVB (5117): Fix: VIDIOC_G_TUNER were returning an endless number of tuners

pvrusb2 have only one tuner inside. However, as it were not handling
index, a call to v4l-info were returning as if it were an infinite
number of tuners:
$ v4l-info|grep VIDIOC_G_TUNER |head -5
    VIDIOC_G_TUNER(0)
    VIDIOC_G_TUNER(1)
    VIDIOC_G_TUNER(2)
    VIDIOC_G_TUNER(3)
    VIDIOC_G_TUNER(4)

Acked-by: Mike Isely <isely@isely.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/media/video/pvrusb2/pvrusb2-v4l2.c b/drivers/media/video/pvrusb2/pvrusb2-v4l2.c
index 53323c338a6d..49f5d3c3614c 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-v4l2.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-v4l2.c
@@ -365,6 +365,10 @@ static int pvr2_v4l2_do_ioctl(struct inode *inode, struct file *file,
         case VIDIOC_G_TUNER:
         {
                 struct v4l2_tuner *vt = (struct v4l2_tuner *)arg;
+
+                if (vt->index != 0)
+                        break;
+
                 pvr2_hdw_execute_tuner_poll(hdw);
                 ret = pvr2_hdw_get_tuner_status(hdw,vt);
                 break;