[media] saa7110: fix querystd

Return V4L2_STD_UNKNOWN if no signal is detected.
Otherwise AND the standard mask with the detected standards.

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

diff --git a/drivers/media/i2c/saa7110.c b/drivers/media/i2c/saa7110.c
index 532105de96f03a7cd3e990cdbeff9a7f745500a2..ac43e929a1d6eabbc2333676e088c133fea2107a 100644 (file)
--- a/drivers/media/i2c/saa7110.c
+++ b/drivers/media/i2c/saa7110.c
@@ -202,7 +202,7 @@ static v4l2_std_id determine_norm(struct v4l2_subdev *sd)
        status = saa7110_read(sd);
        if (status & 0x40) {
                v4l2_dbg(1, debug, sd, "status=0x%02x (no signal)\n", status);
-               return decoder->norm;   /* no change*/
+               return V4L2_STD_UNKNOWN;
        }
        if ((status & 3) == 0) {
                saa7110_write(sd, 0x06, 0x83);
@@ -264,7 +264,7 @@ static int saa7110_g_input_status(struct v4l2_subdev *sd, u32 *pstatus)
 
 static int saa7110_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
 {
-       *(v4l2_std_id *)std = determine_norm(sd);
+       *std &= determine_norm(sd);
        return 0;
 }