Question about mac80211 callback

Question about mac80211 callback

[Larry Finger]

Johannes,

I tried to figure this out from the code, but I kept getting lost.

When a computer goes into hibernation, which of the mac80211 callback routines
are called, and which ones on the following resume? The problem arises due to
the problem in Bug #14267. The routine to check the hardware status of the
RFKILL switch is being entered with b43_status() returning 0, thus the hardware
switch is not checked. If we do not check for that condition, then we get a
machine fault on PPC. I would like to be able to track this problem down. I've
already entered two bad patches in this area.

Thanks,

Larry

Re: Question about mac80211 callback

[Johannes Berg]

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Larry,

> I tried to figure this out from the code, but I kept getting lost.
> 
> When a computer goes into hibernation, which of the mac80211 callback routines
> are called, and which ones on the following resume? 

mac80211 will be called via cfg80211, and will run __ieee80211_suspend()
which calls a whole bunch of driver things. This is _before_ the
driver's suspend() callback runs.

Then, after the driver's resume() callback runs, we go into
ieee80211_reconfig() in mac80211.

You can find the interaction with the PM subsystem in
net/wireless/sysfs.c.

> The problem arises due to
> the problem in Bug #14267. 

Wrong bug number?

johannes


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