[media] v4l2-ioctl.c: fix enum_freq_bands handling

If the driver supports enum_freq_bands, but only for certain device
nodes, then it may return -ENOTTY. But in that case the code should
fall into the fall-back case where the current tuner/modulator range
is returned.

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

diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index cd9e94c..aef588c 100644 (file)
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -2042,8 +2042,11 @@ static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
                if (type != p->type)
                        return -EINVAL;
        }
-       if (ops->vidioc_enum_freq_bands)
-               return ops->vidioc_enum_freq_bands(file, fh, p);
+       if (ops->vidioc_enum_freq_bands) {
+               err = ops->vidioc_enum_freq_bands(file, fh, p);
+               if (err != -ENOTTY)
+                       return err;
+       }
        if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
                struct v4l2_tuner t = {
                        .index = p->tuner,