linux-kernel - Re: [PATCH 08/15] memory: kill off set_irq

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Date:	Thu, 11 Jun 2015 17:00:38 +0300
From:	Roger Quadros <rogerq@...com>
To:	Rob Herring <robh@...nel.org>
CC:	Russell King <linux@....linux.org.uk>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"arm@...nel.org" <arm@...nel.org>,
	"Tony Lindgren" <tony@...mide.com>,
	linux-omap <linux-omap@...r.kernel.org>
Subject: Re: [PATCH 08/15] memory: kill off set_irq_flags usage

On Thu, 11 Jun 2015 08:17:45 -0500
Rob Herring <robh@...nel.org> wrote:

> On Thu, Jun 11, 2015 at 7:18 AM, Roger Quadros <rogerq@...com> wrote:
> > Rob,
> >
> > On Tue, 9 Jun 2015 13:26:34 -0500
> > Rob Herring <robh@...nel.org> wrote:
> >
> >> set_irq_flags is ARM specific with custom flags which have genirq
> >> equivalents. Convert drivers to use the genirq interfaces directly, so we
> >> can kill off set_irq_flags. The translation of flags is as follows:
> >>
> >> IRQF_VALID -> !IRQ_NOREQUEST
> >> IRQF_PROBE -> !IRQ_NOPROBE
> >> IRQF_NOAUTOEN -> IRQ_NOAUTOEN
> >>
> >> For IRQs managed by an irqdomain, the irqdomain core code handles clearing
> >> and setting IRQ_NOREQUEST already, so there is no need to do this in
> >> .map() functions and we can simply remove the set_irq_flags calls. Some
> >> users also set IRQ_NOPROBE and this has been maintained although it is not
> >> clear that is really needed. There appears to be a great deal of blind
> >> copy and paste of this code.
> >>
> >> Signed-off-by: Rob Herring <robh@...nel.org>
> >> Cc: Roger Quadros <rogerq@...com>
> >> Cc: Tony Lindgren <tony@...mide.com>
> >> Cc: linux-omap@...r.kernel.org
> >> ---
> >>  drivers/memory/omap-gpmc.c | 5 ++---
> >>  1 file changed, 2 insertions(+), 3 deletions(-)
> >>
> >> diff --git a/drivers/memory/omap-gpmc.c b/drivers/memory/omap-gpmc.c
> >> index c94ea0d..0c833e2 100644
> >> --- a/drivers/memory/omap-gpmc.c
> >> +++ b/drivers/memory/omap-gpmc.c
> >> @@ -1176,8 +1176,8 @@ static int gpmc_setup_irq(void)
> >>               gpmc_client_irq[i].irq = gpmc_irq_start + i;
> >>               irq_set_chip_and_handler(gpmc_client_irq[i].irq,
> >>                                       &gpmc_irq_chip, handle_simple_irq);
> >> -             set_irq_flags(gpmc_client_irq[i].irq,
> >> -                             IRQF_VALID | IRQF_NOAUTOEN);
> >> +             irq_modify_status(gpmc_client_irq[i].irq, IRQ_NOREQUEST,
> >> +                               IRQ_NOAUTOEN);
> >
> > Shouldn't this be
> >                 irq_modify_status(gpmc_client_irq[i].irq, IRQ_NOREQUEST,
> >                                   IRQ_NOAUTOEN | IRQ_NOPROBE);
> > ?
> 
> Only if this needs to work on !ARM. The default for ARM is IRQ_NOPROBE set.

OK. In that case.

Acked-by: Roger Quadros <rogerq@...com>

cheers,
-roger
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