linux-kernel - Re: [PATCH] irqdomain: Do not reuse existing mappings

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Message-ID: <20130603073532.GA30878@dhcp-26-207.brq.redhat.com>
Date:	Mon, 3 Jun 2013 09:35:33 +0200
From:	Alexander Gordeev <agordeev@...hat.com>
To:	Grant Likely <grant.likely@...retlab.ca>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Mike Qiu <qiudayu@...ux.vnet.ibm.com>,
	Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH] irqdomain: Do not reuse existing mappings

On Sun, Jun 02, 2013 at 05:52:21PM +0100, Grant Likely wrote:
> On Sun, Jun 2, 2013 at 12:56 PM, Alexander Gordeev <agordeev@...hat.com> wrote:
> > On Fri, May 31, 2013 at 11:30:24PM +0100, Grant Likely wrote:
> >> On Fri, 31 May 2013 14:59:11 +0200, Alexander Gordeev <agordeev@...hat.com> wrote:
> >> What exactly is the problem that you're trying to solve with this patch?
> >> It's not clear from the description.
> >
> > Hi Grant,
> >
> > Thanks for the clarification!
> >
> > No particular problem - I just was confused with this particular behaviour
> > and failed to put RFC in subject line. Sorry for that.
> 
> Hi Alexander,
> 
> So there isn't an actual bug or problem that you're trying to solve?
> If you've got a problem on a real system then I'd like to know about
> it.

Well, there is a QLogic HBA chip which does not support MSI-X, but does
support multiple MSIs (I suspect there are few of them in fact). The change
I posted is part of the update (multiple MSIs enablement + qla2xxx driver
change), but the whole series is not tested and frankly, I am not sure I
ever post it. So please nevermind ;)

> g.

-- 
Regards,
Alexander Gordeev
agordeev@...hat.com
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