linux-kernel - Re: [REGRESSION] 2.6.24/25: random lockups when accessing external USB harddrive

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Date:	Sat, 28 Jun 2008 17:31:38 +0300
From:	Stefan Becker <Stefan.Becker@...ia.com>
To:	ext David Brownell <david-b@...bell.net>,
	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
CC:	ext Alan Stern <stern@...land.harvard.edu>
Subject: Re: [REGRESSION] 2.6.24/25: random lockups when accessing external
 USB harddrive

Hi David,

ext David Brownell wrote:
> 
> If 442258e2ff69276ff767f3703b30ce6a31fdd181 isn't in the
> kernel with those bugs, try applying it... else, I suggest

That commit is about 4 months later than the commit I tracked down with 
git bisect. I'm currently testing with 2.6.26-rc8, so that commit is in.

> you try putting something like your
> 
> 	if (!raw_irqs_disabled()) {
> 		printk(KERN_CRIT "interrupts enabled!\n");
> 		dump_stack();
>         }
> 
> logic at the beginning and end of usb_hcd_giveback_urb ... and
> maybe have it dump the address of the completion handler, when
> you can finger such a handler as re-enabling IRQs.

See my reply to Alan's mail...

Regards,

	Stefan

---
Stefan Becker
E-Mail: Stefan.Becker@...ia.com
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