linux-kernel - Re: [PATCH] firewire: Fix ohci free

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Message-ID: <Pine.LNX.4.44L0.1301291158130.1507-100000@iolanthe.rowland.org>
Date:	Tue, 29 Jan 2013 12:01:13 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Stefan Richter <stefanr@...6.in-berlin.de>
cc:	Mark Einon <mark.einon@...il.com>,
	<linux1394-devel@...ts.sourceforge.net>,
	<linux-kernel@...r.kernel.org>, <linux-pm@...r.kernel.org>
Subject: Re: [PATCH] firewire: Fix ohci free_irq() warning

On Tue, 29 Jan 2013, Stefan Richter wrote:

> Added Cc: linux-pm.
> 
> On Jan 29 Mark Einon wrote:
> > On 28 January 2013 23:01, Stefan Richter <stefanr@...6.in-berlin.de> wrote:
> > > On Jan 28 Mark Einon wrote:
> > >> This patch fixes the kernel warning generated when putting an MSI MS-1727
> > >> GT740 laptop into suspend mode. The call sequence in this case calls
> > >> free_irq() twice, once in pci_remove() and once then in pci_suspend().
> > >
> > > You mean /first/ in pci_suspend() and /then/ in pci_remove() on the
> > > already suspended devices, right?
> > 
> > Yes, I did. The call sequence is suspend then resume. My bad.

Why does the pci_suspend routine call free_irq() at all?  As far as I 
know, it's not supposed to do that.  Won't the device continue to use 
the same IRQ after it is resumed?

Alan Stern

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