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| author | Henrique de Moraes Holschuh <hmh@hmh.eng.br> | 2008-07-21 21:18:17 -0300 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2008-07-29 16:36:32 -0400 |
| commit | 2fd9b2212e25e6411b6f309707f4e2683d164250 (patch) | |
| tree | b886e6d11d3478f86ac7e270ef1dfc7fe02e7128 /net/rfkill | |
| parent | 734b5aa911dc65f4563048f069dfc631c9aa7de7 (diff) | |
| download | lwn-2fd9b2212e25e6411b6f309707f4e2683d164250.tar.gz lwn-2fd9b2212e25e6411b6f309707f4e2683d164250.zip | |
rfkill: document rfkill_force_state as required (v2)
While the rfkill class does work with just get_state(), it doesn't work
well on devices that are subject to external events that cause rfkill state
changes.
Document that rfkill_force_state() is required in those cases.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/rfkill')
| -rw-r--r-- | net/rfkill/rfkill.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/net/rfkill/rfkill.c b/net/rfkill/rfkill.c index 7a560b785097..022fe50ab0e0 100644 --- a/net/rfkill/rfkill.c +++ b/net/rfkill/rfkill.c @@ -252,7 +252,12 @@ EXPORT_SYMBOL_GPL(rfkill_epo); * a notification by the firmware/hardware of the current *real* * state of the radio rfkill switch. * - * It may not be called from an atomic context. + * Devices which are subject to external changes on their rfkill + * state (such as those caused by a hardware rfkill line) MUST + * have their driver arrange to call rfkill_force_state() as soon + * as possible after such a change. + * + * This function may not be called from an atomic context. */ int rfkill_force_state(struct rfkill *rfkill, enum rfkill_state state) { |