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| author | Florian Fainelli <f.fainelli@gmail.com> | 2021-10-20 21:48:51 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2021-10-20 22:06:33 +0300 |
| commit | 3578fd47137c405b6fb9f90e2e6d1654c71f5e1e (patch) | |
| tree | b73c1158e02dc806b1a4aba21ebe890490f731e2 /drivers/irqchip | |
| parent | 35eb2ef5df42d3c3d2186ae6dab5622a31e6ceee (diff) | |
| download | linux-3578fd47137c405b6fb9f90e2e6d1654c71f5e1e.tar.xz | |
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.c | 4 |
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 |