It was found by trial and error testing that at least 11 ms delay is needed before first I/O, otherwise device will skip given command. Signed-off-by: Antti Palosaari <crope@xxxxxx> --- drivers/media/radio/radio-keene.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/media/radio/radio-keene.c b/drivers/media/radio/radio-keene.c index 99da3d4..21db23b 100644 --- a/drivers/media/radio/radio-keene.c +++ b/drivers/media/radio/radio-keene.c @@ -382,6 +382,8 @@ static int usb_keene_probe(struct usb_interface *intf, video_set_drvdata(&radio->vdev, radio); set_bit(V4L2_FL_USE_FH_PRIO, &radio->vdev.flags); + /* at least 11ms is needed in order to settle hardware */ + msleep(20); keene_cmd_main(radio, 95.16 * FREQ_MUL, false); retval = video_register_device(&radio->vdev, VFL_TYPE_RADIO, -1); -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
