[PATCH] ARM: S5P: Can handle edge interrupt handler

[hs1218.kang@samsung.com (Huisung Kang)]

> From: linux-samsung-soc-owner at vger.kernel.org [mailto:linux-samsung-soc-owner at vger.kernel.org] On Behalf Of Tomasz
> Figa
> Sent: Saturday, February 11, 2012 5:02 AM
> To: Huisung Kang
> Cc: linux-arm-kernel at lists.infradead.org; linux-samsung-soc at vger.kernel.org; kgene.kim at samsung.com;
> keyyoung.park at samsung.com
> Subject: Re: [PATCH] ARM: S5P: Can handle edge interrupt handler
> 
> I wonder if same thing wouldn't be also needed for s3c64xx.
> 
> Also please see my comments inline.
> 
> On Friday 10 of February 2012 22:02:42 Huisung Kang wrote:
> > From: KeyYoung Park <keyyoung.park@samsung.com>
> >
> > While wake up, if external interrupt uses handle_level_irq as
> > handle_irq (it actually uses edge type irq), That interrupt is missed.
> > So, if external uses edge type irq, it should use handle_edge_irq.
> >
> > Signed-off-by: KeyYoung Park <keyyoung.park@samsung.com>
> > Signed-off-by: Huisung Kang <hs1218.kang@samsung.com>
> > ---
> >  arch/arm/plat-s5p/irq-eint.c |    6 ++++++
> >  1 files changed, 6 insertions(+), 0 deletions(-)
> >
> > diff --git a/arch/arm/plat-s5p/irq-eint.c
> > b/arch/arm/plat-s5p/irq-eint.c index c496b35..6ed395e 100644
> > --- a/arch/arm/plat-s5p/irq-eint.c
> > +++ b/arch/arm/plat-s5p/irq-eint.c
> > @@ -65,6 +65,7 @@ static int s5p_irq_eint_set_type(struct irq_data
> > *data, unsigned int type) int shift;
> >  	u32 ctrl, mask;
> >  	u32 newvalue = 0;
> > +	struct irq_desc *desc = irq_to_desc(data->irq);
> >
> >  	switch (type) {
> >  	case IRQ_TYPE_EDGE_RISING:
> > @@ -115,6 +116,11 @@ static int s5p_irq_eint_set_type(struct irq_data
> > *data, unsigned int type) else
> >  		printk(KERN_ERR "No such irq number %d", offs);
> >
> > +	if (type & IRQ_TYPE_EDGE_BOTH)
> > +		desc->handle_irq = handle_edge_irq;
> > +	else
> > +		desc->handle_irq = handle_level_irq;
> 
> Maybe it would be better to use __irq_set_handler_locked here instead of touching irq_desc directly?
Thanks for your review. I will send new patch.
> 
> > +
> >  	return 0;
> >  }
> 
> Regards,
> Tom
> 
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