Commit-ID: b8802f76fe473d91886220498aeda157c492f2d1
Gitweb: http://git.kernel.org/tip/b8802f76fe473d91886220498aeda157c492f2d1
Author: Haojian Zhuang <haojian.zhuang@xxxxxxxxxx>
AuthorDate: Sun, 11 May 2014 16:05:58 +0800
Committer: Jason Cooper <jason@xxxxxxxxxxxxxx>
CommitDate: Mon, 19 May 2014 00:35:23 +0000
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 <haojian.zhuang@xxxxxxxxxx>
Link: https://lkml.kernel.org/r/1399795571-17231-3-git-send-email-haojian.zhuang@xxxxxxxxxx
Signed-off-by: Jason Cooper <jason@xxxxxxxxxxxxxx>
---
drivers/irqchip/irq-gic.c | 2 +-
include/linux/irqchip/arm-gic.h | 2 ++
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index 4300b66..f711fb6 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 7ed92d0..45e2d8c 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
--
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