linux-kernel - Re: [PATCH] irq: Warn when shared interrupts do not match on NO

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Message-ID: <3893758.epUfayuv4Z@vostro.rjw.lan>
Date:	Thu, 24 Jul 2014 16:39:23 +0200
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] irq: Warn when shared interrupts do not match on NO_SUSPEND

On Thursday, July 24, 2014 04:15:25 PM Peter Zijlstra wrote:
> On Thu, Jul 24, 2014 at 03:46:38PM +0200, Thomas Gleixner wrote:
> > On Thu, 24 Jul 2014, Peter Zijlstra wrote:
> > 
> > > Subject: irq: Warn when shared interrupts do not match on NO_SUSPEND
> > > 
> > > When suspend_device_irqs() iterates all descriptors, its pointless if
> > > one has NO_SUSPEND set while another has not.
> > > 
> > > Validate on request_irq() that NO_SUSPEND state maches for SHARED
> > > interrupts.
> > 
> > I'm happy to take that patch, but you are aware that it is going to
> > break a few things?
> > 
> >   25:  ....   PCI-MSI-edge      aerdrv, PCIe PME
> 
> Better an obvious splat than non obvious misbehaviour in my book.

And it will only break things that are already broken.

ACK for the patch.

Rafael

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