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authorFlorian Fainelli <f.fainelli@gmail.com>2021-10-20 11:48:51 -0700
committerMarc Zyngier <maz@kernel.org>2021-10-20 20:06:33 +0100
commit3578fd47137c405b6fb9f90e2e6d1654c71f5e1e (patch)
treeb73c1158e02dc806b1a4aba21ebe890490f731e2 /drivers/irqchip
parent35eb2ef5df42d3c3d2186ae6dab5622a31e6ceee (diff)
irqchip/irq-bcm7038-l1: Restrict affinity setting to MIPS
Only MIPS based platforms using this interrupt controller as first level interrupt controller can actually change the affinity of interrupts by re-programming the affinity mask of the interrupt controller and use another word group to have another CPU process the interrupt. When this interrupt is used as a second level interrupt controller on ARM/ARM64 there is no way to change the interrupt affinity. This fixes a NULL pointer de-reference while trying to change the affinity since there is only a single word group in that case, and we would have been overruning the intc->cpus[] array. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20211020184859.2705451-6-f.fainelli@gmail.com
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-bcm7038-l1.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-bcm7038-l1.c b/drivers/irqchip/irq-bcm7038-l1.c
index 3c4e348c661e..357570dd8780 100644
--- a/drivers/irqchip/irq-bcm7038-l1.c
+++ b/drivers/irqchip/irq-bcm7038-l1.c
@@ -191,6 +191,7 @@ static void bcm7038_l1_mask(struct irq_data *d)
raw_spin_unlock_irqrestore(&intc->lock, flags);
}
+#if defined(CONFIG_MIPS) && defined(CONFIG_SMP)
static int bcm7038_l1_set_affinity(struct irq_data *d,
const struct cpumask *dest,
bool force)
@@ -217,6 +218,7 @@ static int bcm7038_l1_set_affinity(struct irq_data *d,
return 0;
}
+#endif
static int __init bcm7038_l1_init_one(struct device_node *dn,
unsigned int idx,
@@ -365,7 +367,9 @@ static struct irq_chip bcm7038_l1_irq_chip = {
.name = "bcm7038-l1",
.irq_mask = bcm7038_l1_mask,
.irq_unmask = bcm7038_l1_unmask,
+#if defined(CONFIG_SMP) && defined(CONFIG_MIPS)
.irq_set_affinity = bcm7038_l1_set_affinity,
+#endif
#ifdef CONFIG_PM_SLEEP
.irq_set_wake = bcm7038_l1_set_wake,
#endif