From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757596AbbIVI2I (ORCPT ); Tue, 22 Sep 2015 04:28:08 -0400 Received: from eusmtp01.atmel.com ([212.144.249.243]:48013 "EHLO eusmtp01.atmel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757127AbbIVI2G (ORCPT ); Tue, 22 Sep 2015 04:28:06 -0400 Subject: Re: [PATCH 1/3] irqchip: atmel-aic5: fix bug with mask/unmask To: Ludovic Desroches , , , References: <1442843173-2390-1-git-send-email-ludovic.desroches@atmel.com> CC: , , , , , From: Nicolas Ferre Organization: atmel Message-ID: <560110E7.50306@atmel.com> Date: Tue, 22 Sep 2015 10:27:19 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 In-Reply-To: <1442843173-2390-1-git-send-email-ludovic.desroches@atmel.com> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 8bit X-Originating-IP: [10.161.30.18] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Le 21/09/2015 15:46, Ludovic Desroches a écrit : > 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@vger.kernel.org #3.18 Pretty important fix indeed! Acked-by: Nicolas Ferre Thomas, Jason, can we please have this series queued for the 4.3-rc phase? Bye, > --- > > 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) > -- Nicolas Ferre