From: Haojian Zhuang Date: Sun, 11 May 2014 08:05:58 +0000 (+0800) Subject: irqchip: gic: Use mask field in GICC_IAR X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b8802f76fe473d91886220498aeda157c492f2d1;p=linux-beck.git irqchip: gic: Use mask field in GICC_IAR Bit[9:0] is interrupt ID field in GICC_IAR. Bit[12:10] is CPU ID field, and others are reserved. So we should use GICC_IAR_INT_ID_MASK to get interrupt ID. It's not a good way to use ~0x1c00 (CPU ID field) to get interrupt ID. Signed-off-by: Haojian Zhuang Link: https://lkml.kernel.org/r/1399795571-17231-3-git-send-email-haojian.zhuang@linaro.org Signed-off-by: Jason Cooper --- diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c index 4300b6606f5e..f711fb6af7a9 100644 --- a/drivers/irqchip/irq-gic.c +++ b/drivers/irqchip/irq-gic.c @@ -287,7 +287,7 @@ static void __exception_irq_entry gic_handle_irq(struct pt_regs *regs) do { irqstat = readl_relaxed(cpu_base + GIC_CPU_INTACK); - irqnr = irqstat & ~0x1c00; + irqnr = irqstat & GICC_IAR_INT_ID_MASK; if (likely(irqnr > 15 && irqnr < 1021)) { irqnr = irq_find_mapping(gic->domain, irqnr); diff --git a/include/linux/irqchip/arm-gic.h b/include/linux/irqchip/arm-gic.h index 7ed92d0560d5..45e2d8c15bd2 100644 --- a/include/linux/irqchip/arm-gic.h +++ b/include/linux/irqchip/arm-gic.h @@ -21,6 +21,8 @@ #define GIC_CPU_ACTIVEPRIO 0xd0 #define GIC_CPU_IDENT 0xfc +#define GICC_IAR_INT_ID_MASK 0x3ff + #define GIC_DIST_CTRL 0x000 #define GIC_DIST_CTR 0x004 #define GIC_DIST_IGROUP 0x080