From 4081f00dc45abce6bdac352a6354c07ce15db45b Mon Sep 17 00:00:00 2001 From: Henrique de Moraes Holschuh Date: Mon, 23 Jun 2008 17:23:07 -0300 Subject: rfkill: do not allow userspace to override ALL RADIOS OFF SW_RFKILL_ALL is the "emergency power-off all radios" input event. It must be handled, and must always do the same thing as far as the rfkill system is concerned: all transmitters are to go *immediately* offline. For safety, do NOT allow userspace to override EV_SW SW_RFKILL_ALL OFF. As long as rfkill-input is loaded, that event will *always* be processed, and it will *always* force all rfkill switches to disable all wireless transmitters, regardless of user_claim attribute or anything else. Signed-off-by: Henrique de Moraes Holschuh Acked-by: Ivo van Doorn Cc: Dmitry Torokhov Signed-off-by: John W. Linville --- net/rfkill/rfkill.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'net/rfkill/rfkill.c') diff --git a/net/rfkill/rfkill.c b/net/rfkill/rfkill.c index dd1c3f18f31d..7d07175c407f 100644 --- a/net/rfkill/rfkill.c +++ b/net/rfkill/rfkill.c @@ -181,6 +181,24 @@ void rfkill_switch_all(enum rfkill_type type, enum rfkill_state state) } EXPORT_SYMBOL(rfkill_switch_all); +/** + * rfkill_epo - emergency power off all transmitters + * + * This kicks all rfkill devices to RFKILL_STATE_OFF, ignoring + * everything in its path but rfkill_mutex. + */ +void rfkill_epo(void) +{ + struct rfkill *rfkill; + + mutex_lock(&rfkill_mutex); + list_for_each_entry(rfkill, &rfkill_list, node) { + rfkill_toggle_radio(rfkill, RFKILL_STATE_OFF, 1); + } + mutex_unlock(&rfkill_mutex); +} +EXPORT_SYMBOL_GPL(rfkill_epo); + /** * rfkill_force_state - Force the internal rfkill radio state * @rfkill: pointer to the rfkill class to modify. -- cgit v1.2.2