linux-kernel - Re: [PATCH 12/15] SH: kill off set_irq

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Date:	Wed, 8 Jul 2015 10:04:35 +0900
From:	Simon Horman <horms@...ge.net.au>
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>,
	Magnus Damm <magnus.damm@...il.com>,
	SH-Linux <linux-sh@...r.kernel.org>
Subject: Re: [PATCH 12/15] SH: kill off set_irq_flags usage

On Tue, Jul 07, 2015 at 09:38:53AM -0500, Rob Herring wrote:
> On Mon, Jul 6, 2015 at 8:55 PM, Simon Horman <horms@...ge.net.au> wrote:
> > On Tue, Jul 07, 2015 at 09:53:39AM +0900, Simon Horman wrote:
> >> On Tue, Jun 09, 2015 at 01:26:38PM -0500, Rob Herring 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: Simon Horman <horms@...ge.net.au>
> >> > Cc: Magnus Damm <magnus.damm@...il.com>
> >> > Cc: linux-sh@...r.kernel.org
> >>
> >> I am trusting the description above coupled with the comments in
> >> the original code (that this patch removes). Assuming those ducks are
> >> aligned:
> >>
> >> Acked-by: Simon Horman <horms+renesas@...ge.net.au>
> >
> > As I usually take patches for drivers/sh/ (there have not been many of late)
> > please let me know if you would like me to pick up this change.
> 
> This is a dependency for removing set_irq_flags from ARM, so I plan to
> send the whole series to arm-soc.

Thanks, that is fine by me.

> > Also, a very minor nit, the prefix for patches to this file is usually
> > 'sh:' rather than 'SH:'.
> 
> Okay, will fix-up.
> 
> Rob
> 
> >
> >>
> >> > ---
> >> >  drivers/sh/intc/internals.h | 10 +---------
> >> >  1 file changed, 1 insertion(+), 9 deletions(-)
> >> >
> >> > diff --git a/drivers/sh/intc/internals.h b/drivers/sh/intc/internals.h
> >> > index 7dff08e..897ffb1 100644
> >> > --- a/drivers/sh/intc/internals.h
> >> > +++ b/drivers/sh/intc/internals.h
> >> > @@ -99,15 +99,7 @@ static inline struct intc_desc_int *get_intc_desc(unsigned int irq)
> >> >   */
> >> >  static inline void activate_irq(int irq)
> >> >  {
> >> > -#ifdef CONFIG_ARM
> >> > -   /* ARM requires an extra step to clear IRQ_NOREQUEST, which it
> >> > -    * sets on behalf of every irq_chip.  Also sets IRQ_NOPROBE.
> >> > -    */
> >> > -   set_irq_flags(irq, IRQF_VALID);
> >> > -#else
> >> > -   /* same effect on other architectures */
> >> > -   irq_set_noprobe(irq);
> >> > -#endif
> >> > +   irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
> >> >  }
> >> >
> >> >  static inline int intc_handle_int_cmp(const void *a, const void *b)
> >> > --
> >> > 2.1.0
> >> >
> >> --
> >> To unsubscribe from this list: send the line "unsubscribe linux-sh" in
> >> the body of a message to majordomo@...r.kernel.org
> >> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> >>
> 
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