linux-kernel - Re: [PATCH] USB: fix interrupt disabling for HCDs with shared interrupt handlers

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Date:	Tue, 1 Jul 2008 14:59:38 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Greg KH <gregkh@...e.de>
cc:	Stefan Becker <Stefan.Becker@...ia.com>,
	<linux-usb@...r.kernel.org>,
	ext David Brownell <david-b@...bell.net>,
	<linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	ext Leonardo Chiquitto <leonardo.lists@...il.com>
Subject: Re: [PATCH] USB: fix interrupt disabling for HCDs with shared
 interrupt handlers

On Tue, 1 Jul 2008, Greg KH wrote:

> Hm, isn't this also an issue in 2.6.25 as well?  I've had a few very
> strange reports of USB just locking up in 2.6.25, could this also be the
> cause there?

It could go back a lot farther than that.  I don't think our interrupt 
setup has been changed significantly for a long time, with one 
exception: We added the IRQF_DISABLED flag fairly recently.  But of 
course, we now know that it doesn't do what we expected.

It's surprising that more people haven't experienced this problem and 
reported it.

> Alan and Dave, do you both ack this thing?  I know you've been involved
> in creating it, just want to get the formal approval :)

Acked-by: Alan Stern <stern@...land.harvard.edu>

There still are a few places where spaces were used instead of tabs for 
indenting.  Aside from that it looks fine.

Alan Stern

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