media: rc: default to idle on at startup or after reset

Any spaces events received after a reset or startup should be discarded,
so ensure the rc device is in idle mode.

This also makes it much easier to detect incorrect raw events, as we will
do in a following commit.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/rc/rc-ir-raw.c

@@ -611,6 +611,7 @@ int ir_raw_event_prepare(struct rc_dev *dev)
 
 	dev->raw->dev = dev;
 	dev->change_protocol = change_protocol;
+	dev->idle = true;
 	spin_lock_init(&dev->raw->edge_spinlock);
 	timer_setup(&dev->raw->edge_handle, ir_raw_edge_handle, 0);
 	INIT_KFIFO(dev->raw->kfifo);

include/media/rc-core.h

@@ -347,6 +347,7 @@ static inline void ir_raw_event_reset(struct rc_dev *dev)
 	struct ir_raw_event ev = { .reset = true };
 
 	ir_raw_event_store(dev, &ev);
+	dev->idle = true;
 	ir_raw_event_handle(dev);
 }