linux-kernel - Re: [PATCH v4 1/2] PCI: Add tango MSI controller support

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Date:   Wed, 31 May 2017 14:00:37 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Mason <slash.tmp@...e.fr>
Cc:     Marc Zyngier <marc.zyngier@....com>,
        Robin Murphy <robin.murphy@....com>,
        Marc Gonzalez <marc_gonzalez@...madesigns.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Liviu Dudau <liviu.dudau@....com>,
        David Laight <david.laight@...lab.com>,
        linux-pci <linux-pci@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 1/2] PCI: Add tango MSI controller support

On Wed, May 31, 2017 at 08:49:04PM +0200, Mason wrote:
> On 31/05/2017 19:34, Bjorn Helgaas wrote:
> ...

> > This would be more an IRQ patch than a PCI patch, but if I were
> > reviewing it, I would look for assurance that *all* the no-op
> > .irq_set_affinity callbacks were cleaned up, not just those in
> > drivers/pci/host.
> 
> Are you saying the patch is *wrong* if not all "do-nothing"
> callbacks are cleaned up?

I'm saying that (1) this probably wouldn't be applied via the PCI
tree, and (2) if it *were* applied via PCI, I would ask that all the
no-op callbacks were cleaned up at the same time.

Huh, that sounds a lot like what I wrote above.  Was I unclear?

Bjorn