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

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Date:	Tue, 7 Jul 2015 10:55:03 +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-kernel@...r.kernel.org,
	arm@...nel.org, Magnus Damm <magnus.damm@...il.com>,
	linux-sh@...r.kernel.org
Subject: Re: [PATCH 12/15] SH: kill off set_irq_flags usage

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.

Also, a very minor nit, the prefix for patches to this file is usually
'sh:' rather than 'SH:'.

> 
> > ---
> >  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
> > 
> --
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