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ARM: 6524/1: GIC irq desciptor bug fix

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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>
This commit is contained in:
Chao Xie 2010-12-06 07:01:10 +01:00 committed by Russell King
parent a5542a0f9a
commit 87507500b7
1 changed files with 7 additions and 1 deletions
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8
arch/arm/common/gic.c
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@ -146,9 +146,15 @@ static int gic_set_cpu(unsigned int irq, const struct cpumask *mask_val)
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);