ARM: 6524/1: GIC irq desciptor bug fix
gic_set_cpu will directly use irq_desc[]. If CONFIG_SPARSE_IRQ is
enabled, there is no irq_desc[]. So we need use irq_to_desc(irq) to
get the descriptor for irq.
Signed-off-by: Chao Xie <chao.xie@marvell.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c
index fea1bd7..e6388dc 100644
--- a/arch/arm/common/gic.c
+++ b/arch/arm/common/gic.c
@@ -146,9 +146,15 @@
unsigned int shift = (irq % 4) * 8;
unsigned int cpu = cpumask_first(mask_val);
u32 val;
+ struct irq_desc *desc;
spin_lock(&irq_controller_lock);
- irq_desc[irq].node = cpu;
+ desc = irq_to_desc(irq);
+ if (desc == NULL) {
+ spin_unlock(&irq_controller_lock);
+ return -EINVAL;
+ }
+ desc->node = cpu;
val = readl(reg) & ~(0xff << shift);
val |= 1 << (cpu + shift);
writel(val, reg);
