[media] radio drivers: in non-blocking mode return EAGAIN in hwseek

VIDIOC_S_HW_FREQ_SEEK should return EAGAIN when called in non-blocking
mode. This might change in the future if we add support for this in the
future, but right now this is not supported.

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

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/media/radio/radio-mr800.c b/drivers/media/radio/radio-mr800.c
index 720bf0da599c..9c5a267b60b4 100644
--- a/drivers/media/radio/radio-mr800.c
+++ b/drivers/media/radio/radio-mr800.c
@@ -360,6 +360,9 @@ static int vidioc_s_hw_freq_seek(struct file *file, void *priv,
         if (seek->tuner != 0 || !seek->wrap_around)
                 return -EINVAL;
 
+        if (file->f_flags & O_NONBLOCK)
+                return -EWOULDBLOCK;
+
         retval = amradio_send_cmd(radio,
                         AMRADIO_SET_SEARCH_LVL, 0, buf, 8, false);
         if (retval)