linux-kernel - Re: PROBLEM: kernel hang in ohci init

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Date:	Sun, 15 Jul 2007 16:59:24 +0530
From:	"Satyam Sharma" <satyam.sharma@...il.com>
To:	"Timo Lindemann" <tlindemann@...or.de>
Cc:	"David Brownell" <david-b@...bell.net>,
	linux-kernel@...r.kernel.org
Subject: Re: PROBLEM: kernel hang in ohci init

On 7/15/07, Satyam Sharma <satyam.sharma@...il.com> wrote:
> On 7/15/07, Timo Lindemann <tlindemann@...or.de> wrote:
> [...]
> > >>> after this, kernel apparently goes into busy waiting (fans gradually
> > >>> turn louder) and hangs indefinitely. I have also made sure that writel
> > >>> (in linux/include/asm/io.h) really is entered, but never returns.
> > >
> > > Does the current kernel.org GIT tree do the same thing?  A bunch
> > > of USB patches were recently merged, including ISTR one in that
> > > area ...
> > It does the same thing, git5, that is. Sorry I took so long, but I didnt
> > get to testing this earlier.
> >
> > It is just odd that up to (not including) the 2.6.21-series every kernel
> > boots, and after that, they just freeze.

There could be another thing, of course. The kernel sources (or .config)
needn't be the only variable here -- if you're using the "old" kernel image
for the 2.6.20 kernel that works, it could be the case that perhaps you've
upgraded userspace packages (compiler/toolchain) in the meanwhile
that's causing this breakage ... so to test, try compiling the 2.6.20 on
your system again (with same .config) and see if it works now ...
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