Thread (58 messages) 58 messages, 5 authors, 2008-09-22

Re: [RFC] b43: A patch for control of the radio LED using rfkill

From: Michael Buesch <hidden>
Date: 2008-09-18 17:53:49

On Thursday 18 September 2008 19:42:28 Ivo van Doorn wrote:
On Thursday 18 September 2008, Michael Buesch wrote:
quoted
On Thursday 18 September 2008 15:47:42 Larry Finger wrote:
quoted
Ivo van Doorn wrote:
quoted
Is dev->phy.radio_on set when mac80211 has send an instruction
to the driver to enable the radio (start() or config() callback)
or does it represent the key state in the hardware?

If it is something coming from mac80211, then you do not want
to send a SOFT_BLOCKED event since that will cause all other radios
to be switched off simply because the b43 interface has not been
enabled.

Off course when it represents the key state in the hardware then the
code would be fine...
The state comes from mac80211 and is set in the config() callback.

What state should be sent at the point when the hardware block is
removed? It seems to me that forcing an UNBLOCKED state gives the
wrong result. Perhaps RFKILL does need to have 4 states so that an
RFKILL_STATE_HW_UNBLOCKED state can be transmitted.
If sw is unblocked, but hw is still blocked, you must not announce
unblocked state to rfkill.
Well from my perspective:
Note that 'sw' is the RADIO state as requested by mac80211 and
'hw' is the RFKILL state as indicated by the hardware

radio: block, rfkill: block => BLOCK
radio: block, rfkill: unblock => UNBLOCK
If the radio is physically blocked by the hardware rfkill switch,
why on earth would we want to announce unblocked state?
Or did I get your table wrong?

(Still note that software and hardware states are _independent_ in b43.
Think of it as two independent bits that can each turn the radio off, where
the hardware state bit is readonly and is triggered by the hw-button).

-- 
Greetings Michael.
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