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irqchip/bcm7038-l1: Implement irq_cpu_offline() callback

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We did not implement an irq_cpu_offline callback for our irqchip, yet we
support setting a given IRQ's affinity. This resulted in interrupts
whose affinity mask included CPUs being taken offline not to work
correctly once the CPU had been put offline.

Fixes: 5f7f0317ed ("IRQCHIP: Add new driver for BCM7038-style level 1 interrupt controllers")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: jason@lakedaemon.net
Cc: marc.zyngier@arm.com
Cc: cernekee@gmail.com
Cc: jaedon.shin@gmail.com
Cc: ralf@linux-mips.org
Cc: justinpopo6@gmail.com
Link: http://lkml.kernel.org/r/1477948656-12966-2-git-send-email-f.fainelli@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Florian Fainelli 2016-10-31 14:17:35 -07:00 committed by Thomas Gleixner
parent b6e5d5b947
commit 34c535793b
1 changed files with 26 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

26
drivers/irqchip/irq-bcm7038-l1.c
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@ -215,6 +215,31 @@ static int bcm7038_l1_set_affinity(struct irq_data *d,
return 0;
}
static void bcm7038_l1_cpu_offline(struct irq_data *d)
{
struct cpumask *mask = irq_data_get_affinity_mask(d);
int cpu = smp_processor_id();
cpumask_t new_affinity;
/* This CPU was not on the affinity mask */
if (!cpumask_test_cpu(cpu, mask))
return;
if (cpumask_weight(mask) > 1) {
/*
* Multiple CPU affinity, remove this CPU from the affinity
* mask
*/
cpumask_copy(&new_affinity, mask);
cpumask_clear_cpu(cpu, &new_affinity);
} else {
/* Only CPU, put on the lowest online CPU */
cpumask_clear(&new_affinity);
cpumask_set_cpu(cpumask_first(cpu_online_mask), &new_affinity);
}
irq_set_affinity_locked(d, &new_affinity, false);
}
static int __init bcm7038_l1_init_one(struct device_node *dn,
unsigned int idx,
struct bcm7038_l1_chip *intc)
@ -266,6 +291,7 @@ static struct irq_chip bcm7038_l1_irq_chip = {
.irq_mask = bcm7038_l1_mask,
.irq_unmask = bcm7038_l1_unmask,
.irq_set_affinity = bcm7038_l1_set_affinity,
.irq_cpu_offline = bcm7038_l1_cpu_offline,
};
static int bcm7038_l1_map(struct irq_domain *d, unsigned int virq,