linux-kernel - Re: [2.6.23.9] hostap_plx locks up PC when reading PCI I/O memory

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Date:	Fri, 28 Dec 2007 01:39:24 +0000 (GMT)
From:	Chris Rankin <rankincj@...oo.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	dcbw@...hat.com, linux-kernel@...r.kernel.org,
	linux-wireless@...r.kernel.org
Subject: Re: [2.6.23.9] hostap_plx locks up PC when reading PCI I/O memory

--- Andrew Morton <akpm@...ux-foundation.org> wrote:
> > > Did any earlier version of the 2.6 kernel work OK?

Kernel 2.6.14 does not work any better than 2.6.23.x, and my F8 userspace environment rejects a
2.4.35 kernel. I will try a 2.6.0 kernel next, but have noticed tonight that a stock Fedora kernel
also hangs when it tries to load the orinoco_plx.ko kernel module. (This module also expect a
PLX9052 bridge.)

For reference, I have found a datasheet for the PLX9052 here:

http://www.dyneng.com/plx_9052.pdf

One theory could be that the PLX9052 chip requires an extra initialisation step for an Intel
SE440BX-2 motherboard (the board that hangs) vs an older Intel Zappa motherboard (where the chip
works OK). However, I don't know anything like enough about PCI to guess what such a step might
be.

Cheers,
Chris

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