On Tuesday 22 July 2008, Henrique de Moraes Holschuh wrote:
> Every time a new input device that is capable of one of the rfkill EV_SW events
> (currently only SW_RFKILL_ALL) is connected to rfkill-input, we must check the
> states of the input EV_SW switches and take action. Otherwise, we will ignore
> the initial switch state.
>
> We also need to re-check the states of the EV_SW switches after a device that
> was under an exclusive grab is released back to us, since we got no input
> events from that device while it was grabbed.
>
> Signed-off-by: Henrique de Moraes Holschuh <hmh@xxxxxxxxxx>
> Cc: Ivo van Doorn <IvDoorn@xxxxxxxxx>
> Cc: Dmitry Torokhov <dtor@xxxxxxx>
Acked-by: Ivo van Doorn <IvDoorn@xxxxxxxxx>
> ---
> net/rfkill/rfkill-input.c | 54 ++++++++++++++++++++++++++++++++------------
> 1 files changed, 39 insertions(+), 15 deletions(-)
>
> diff --git a/net/rfkill/rfkill-input.c b/net/rfkill/rfkill-input.c
> index 8aa8227..827f178 100644
> --- a/net/rfkill/rfkill-input.c
> +++ b/net/rfkill/rfkill-input.c
> @@ -109,6 +109,25 @@ static DEFINE_RFKILL_TASK(rfkill_uwb, RFKILL_TYPE_UWB);
> static DEFINE_RFKILL_TASK(rfkill_wimax, RFKILL_TYPE_WIMAX);
> static DEFINE_RFKILL_TASK(rfkill_wwan, RFKILL_TYPE_WWAN);
>
> +static void rfkill_schedule_evsw_rfkillall(int state)
> +{
> + /* EVERY radio type. state != 0 means radios ON */
> + /* handle EPO (emergency power off) through shortcut */
> + if (state) {
> + rfkill_schedule_set(&rfkill_wwan,
> + RFKILL_STATE_UNBLOCKED);
> + rfkill_schedule_set(&rfkill_wimax,
> + RFKILL_STATE_UNBLOCKED);
> + rfkill_schedule_set(&rfkill_uwb,
> + RFKILL_STATE_UNBLOCKED);
> + rfkill_schedule_set(&rfkill_bt,
> + RFKILL_STATE_UNBLOCKED);
> + rfkill_schedule_set(&rfkill_wlan,
> + RFKILL_STATE_UNBLOCKED);
> + } else
> + rfkill_schedule_epo();
> +}
> +
> static void rfkill_event(struct input_handle *handle, unsigned int type,
> unsigned int code, int data)
> {
> @@ -132,21 +151,7 @@ static void rfkill_event(struct input_handle *handle, unsigned int type,
> } else if (type == EV_SW) {
> switch (code) {
> case SW_RFKILL_ALL:
> - /* EVERY radio type. data != 0 means radios ON */
> - /* handle EPO (emergency power off) through shortcut */
> - if (data) {
> - rfkill_schedule_set(&rfkill_wwan,
> - RFKILL_STATE_UNBLOCKED);
> - rfkill_schedule_set(&rfkill_wimax,
> - RFKILL_STATE_UNBLOCKED);
> - rfkill_schedule_set(&rfkill_uwb,
> - RFKILL_STATE_UNBLOCKED);
> - rfkill_schedule_set(&rfkill_bt,
> - RFKILL_STATE_UNBLOCKED);
> - rfkill_schedule_set(&rfkill_wlan,
> - RFKILL_STATE_UNBLOCKED);
> - } else
> - rfkill_schedule_epo();
> + rfkill_schedule_evsw_rfkillall(data);
> break;
> default:
> break;
> @@ -168,6 +173,7 @@ static int rfkill_connect(struct input_handler *handler, struct input_dev *dev,
> handle->handler = handler;
> handle->name = "rfkill";
>
> + /* causes rfkill_start() to be called */
> error = input_register_handle(handle);
> if (error)
> goto err_free_handle;
> @@ -185,6 +191,23 @@ static int rfkill_connect(struct input_handler *handler, struct input_dev *dev,
> return error;
> }
>
> +static void rfkill_start(struct input_handle *handle)
> +{
> + /* Take event_lock to guard against configuration changes, we
> + * should be able to deal with concurrency with rfkill_event()
> + * just fine (which event_lock will also avoid). */
> + spin_lock_irq(&handle->dev->event_lock);
> +
> + if (test_bit(EV_SW, &handle->dev->evbit)) {
> + if (test_bit(SW_RFKILL_ALL, &handle->dev->swbit))
> + rfkill_schedule_evsw_rfkillall(test_bit(SW_RFKILL_ALL,
> + &handle->dev->sw));
> + /* add resync for further EV_SW events here */
> + }
> +
> + spin_unlock_irq(&handle->dev->event_lock);
> +}
> +
> static void rfkill_disconnect(struct input_handle *handle)
> {
> input_close_device(handle);
> @@ -225,6 +248,7 @@ static struct input_handler rfkill_handler = {
> .event = rfkill_event,
> .connect = rfkill_connect,
> .disconnect = rfkill_disconnect,
> + .start = rfkill_start,
> .name = "rfkill",
> .id_table = rfkill_ids,
> };
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