From mboxrd@z Thu Jan 1 00:00:00 1970 From: boris.brezillon@free-electrons.com (Boris Brezillon) Date: Tue, 22 Sep 2015 09:45:43 +0200 Subject: [PATCH 1/3] irqchip: atmel-aic5: fix bug with mask/unmask In-Reply-To: <1442843173-2390-1-git-send-email-ludovic.desroches@atmel.com> References: <1442843173-2390-1-git-send-email-ludovic.desroches@atmel.com> Message-ID: <20150922094543.17286b98@bbrezillon> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Ludovic, On Mon, 21 Sep 2015 15:46:04 +0200 Ludovic Desroches wrote: > When masking/unmasking interrupts, mask_cache is updated and used later > for suspend/resume. Unfortunately, it always was the mask_cache > associated with the first irq chip which was updated. So when performing > resume, only irqs 0-31 could be enabled and maybe not the good ones! > > Signed-off-by: Ludovic Desroches > Fixes: b1479ebb7720 ("irqchip: atmel-aic: Add atmel AIC/AIC5 drivers") > Cc: stable at vger.kernel.org #3.18 To the whole series Acked-by: Boris Brezillon Thanks, Boris > --- > > Sasha, > > This fix won't apply without conflicts because of irq_reg_writel changes. I > can provide you a fix for 3.18 if you need. > > Regards > > Ludovic > > > drivers/irqchip/irq-atmel-aic5.c | 14 ++++++++------ > 1 file changed, 8 insertions(+), 6 deletions(-) > > diff --git a/drivers/irqchip/irq-atmel-aic5.c b/drivers/irqchip/irq-atmel-aic5.c > index 9da9942..6c5fd25 100644 > --- a/drivers/irqchip/irq-atmel-aic5.c > +++ b/drivers/irqchip/irq-atmel-aic5.c > @@ -88,28 +88,30 @@ static void aic5_mask(struct irq_data *d) > { > struct irq_domain *domain = d->domain; > struct irq_domain_chip_generic *dgc = domain->gc; > - struct irq_chip_generic *gc = dgc->gc[0]; > + struct irq_chip_generic *bgc = dgc->gc[0]; > + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); > > /* Disable interrupt on AIC5 */ > - irq_gc_lock(gc); > + irq_gc_lock(bgc); > irq_reg_writel(gc, d->hwirq, AT91_AIC5_SSR); > irq_reg_writel(gc, 1, AT91_AIC5_IDCR); > gc->mask_cache &= ~d->mask; > - irq_gc_unlock(gc); > + irq_gc_unlock(bgc); > } > > static void aic5_unmask(struct irq_data *d) > { > struct irq_domain *domain = d->domain; > struct irq_domain_chip_generic *dgc = domain->gc; > - struct irq_chip_generic *gc = dgc->gc[0]; > + struct irq_chip_generic *bgc = dgc->gc[0]; > + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); > > /* Enable interrupt on AIC5 */ > - irq_gc_lock(gc); > + irq_gc_lock(bgc); > irq_reg_writel(gc, d->hwirq, AT91_AIC5_SSR); > irq_reg_writel(gc, 1, AT91_AIC5_IECR); > gc->mask_cache |= d->mask; > - irq_gc_unlock(gc); > + irq_gc_unlock(bgc); > } > > static int aic5_retrigger(struct irq_data *d) -- Boris Brezillon, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com