From: Chao Xie <xiechao.linux@gmail.com>
Date: Mon, 6 Dec 2010 06:01:10 +0000 (+0100)
Subject: ARM: 6524/1: GIC irq desciptor bug fix
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=87507500b7fc3620e467abb617a3452f0cccc72d;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

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 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);