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| author | Chao Xie <xiechao.linux@gmail.com> | 2010-12-06 07:01:10 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-12-06 11:03:31 +0000 |
| commit | 87507500b7fc3620e467abb617a3452f0cccc72d (patch) | |
| tree | 6e59fe7fa70cdba79f300a62fc26acb48234bc32 | |
| parent | a5542a0f9aca5588a0afd0489c26d858405bfecb (diff) | |
| download | linux-3.10-87507500b7fc3620e467abb617a3452f0cccc72d.tar.gz linux-3.10-87507500b7fc3620e467abb617a3452f0cccc72d.tar.bz2 linux-3.10-87507500b7fc3620e467abb617a3452f0cccc72d.zip | |
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>
| -rw-r--r-- | arch/arm/common/gic.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c index fea1bd7249b..e6388dcd8cf 100644 --- a/arch/arm/common/gic.c +++ b/arch/arm/common/gic.c @@ -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); |