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Bug#602444: firmware-brcm80211: Kernel Panic on "iwlist scan"



On Thu, 2010-11-04 at 22:52 +0100, Didier Raboud wrote:
> Package: firmware-brcm80211

What has this got to do with the firmware?

> Version: 0.27
> Severity: critical
> Tags: patch
> Justification: breaks the whole system

No it doesn't.

> Hi, 
> 
> Booting the "HP Mini 5103" with the firmware-brcm80211 package installed leads
> to a 100% reproducible Kernel Panic. (Squeeze's 2.6.32 and experimental
> 2.6.36-trunk are affected).
> 
> >From the http://linuxwireless.org/en/users/Drivers/brcm80211 homepage, the fix
> is to load the module with maxcpus=1.
> 
> So a simple patch would be to ship a /etc/modprobe.d/brcm80211.conf containing
> 
> 	options brcm80211 maxcpus=1

Why would we provide a modprobe file when we can change default module
parameters directly?  And how would this work when multiple kernel image
packages are installed?

> I tested that here and it works.
[...]

That's odd because this module doesn't have such an option.  'maxcpus=1'
is a kernel command-line parameter, and strangely enough we do not want
to use it.

Ben.

-- 
Ben Hutchings
Once a job is fouled up, anything done to improve it makes it worse.

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