linux-kernel - Re: [PATCH 3/3] IRQ: Maintain regs pointer globally rather than passing to IRQ handlers

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Date:	Mon, 2 Oct 2006 17:34:40 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	David Brownell <david-b@...bell.net>
cc:	Andrew Morton <akpm@...l.org>, David Howells <dhowells@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, <torvalds@...l.org>,
	<linux-kernel@...r.kernel.org>, <linux-arch@...r.kernel.org>,
	Dmitry Torokhov <dtor@...l.ru>, Greg KH <greg@...ah.com>
Subject: Re: [PATCH 3/3] IRQ: Maintain regs pointer globally rather than
 passing to IRQ handlers

On Mon, 2 Oct 2006, David Brownell wrote:

> > >  (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
> > >      something different depending on whether it's been supplied with a regs
> > >      pointer or not.
> 
> gaak!  where did that come from?  I'll be surprised if removing
> that causes any problem at all.

Here's the statement in question:

	if (likely (regs && HC_IS_RUNNING(ohci_to_hcd(ohci)->state))) {
		...

Notice another questionable use of hcd->state.  I don't know what the 
correct change here is, but I suspect David H's isn't optimal.

Alan Stern

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