Fwd: ath10k related kernel crash in wireless-testing (3.12.0-rc3-wl+)

[Kalle Valo]

Ben Greear <greearb at candelatech.com> writes:

> I sent this to the wrong list the first time.
>
> Do you know if this is already addressed?  If not, I'll see if I can
> find a fix.

[...]

> ath10k: MSI-X interrupt handling (8 intrs)
> ath10k: Unable to wakeup target
> ath10k: target took longer 5000 us to wake up (awake count 1)
> ath10k: Failed to get pcie state addr: -16
> ath10k: early firmware event indicated
> BUG: unable to handle kernel NULL pointer dereference at 0000000000000004
> IP: [<ffffffffa06ae46c>] ath10k_ce_completed_send_next+0x47/0x122
> [ath10k_pci]

I think there are two bugs here:

1) Cold reset doesn't always work, Michal has a patch for that. That's
   why the wakeup fails:

http://lists.infradead.org/pipermail/ath10k/2013-October/000638.html

2) We enable interrupts too early and if wakeup fails and we get a
   spurious interrupt ath10k crashes. We don't have a fix for this yet.

-- 
Kalle Valo