[Bug 319378] Re: [ath9k] Kernel panic in 2.6.27-11

[Luis R. Rodriguez]

On Thu, Jun 11, 2009 at 2:28 AM, Bryan Wu<cooloney at kernel.org> wrote:
> Is this bug fixed or not?
>
> @Luis, Thanks for your upstream patch, do you think it is ok for us to
> cherry pick it to our Jaunty Stable Release Updates.

This should already be part of jaunty, I made sure to inform the
Ubuntu kernel team of the importance of the serialization patches.

On the ath9k wiki we also keep track of known issues and the kernels
when they were fixed. Let me paste the relevant section here:


http://wireless.kernel.org/en/users/Drivers/ath9k
----
Hangs with PCI devices and SMP systems

This issue was due to a hardware limitation on our PCI devices whereby
our device's FIFO queue got filled up and caused a loop. This issue is
only present on our 11n PCI devices, its not present on our
PCI-express devices nor our legacy 802.11abg devices.

The fix was to serialize read/writes – a spin_lock around each read
and write. This fix is not performed for PCI devices or non-SMP
systems. This fix is present in 2.6.29, 2.6.28.10 and 2.6.27.22.
----

In the future just please refer to the wiki page.

  Luis

-- 
[ath9k] Kernel panic in 2.6.27-11
https://bugs.launchpad.net/bugs/319378
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