diff options
| author | Henrique de Moraes Holschuh <hmh@hmh.eng.br> | 2008-06-23 17:23:07 -0300 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2008-06-26 14:21:22 -0400 |
| commit | 4081f00dc45abce6bdac352a6354c07ce15db45b (patch) | |
| tree | 5c1c239eb0e0cfdedf9fdfd0d82bf36c03bfdd99 /net/rfkill/rfkill.c | |
| parent | fbc6af2f3c46df4722f5161d0ad20dd87cd7dfa9 (diff) | |
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 <hmh@hmh.eng.br>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Cc: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/rfkill/rfkill.c')
| -rw-r--r-- | net/rfkill/rfkill.c | 18 |
1 files changed, 18 insertions, 0 deletions
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 @@ -182,6 +182,24 @@ 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. * @state: the current radio state the class should be forced to. |