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genirq: Warn when effective affinity is not updated 

Emit a one time warning when the effective affinity mask is enabled in
Kconfig, but the interrupt chip does not update the mask in its
irq_set_affinity() callback,

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1710042208400.2406@nanos
This commit is contained in:
Thomas Gleixner 2017-10-09 12:41:36 +02:00
parent 8a5776a5f4
commit 19e1d4e947
1 changed files with 14 additions and 0 deletions
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14
kernel/irq/manage.c
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@ -168,6 +168,19 @@ void irq_set_thread_affinity(struct irq_desc *desc)
set_bit(IRQTF_AFFINITY, &action->thread_flags);
}
static void irq_validate_effective_affinity(struct irq_data *data)
{
#ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK
const struct cpumask *m = irq_data_get_effective_affinity_mask(data);
struct irq_chip *chip = irq_data_get_irq_chip(data);
if (!cpumask_empty(m))
return;
pr_warn_once("irq_chip %s did not update eff. affinity mask of irq %u\n",
chip->name, data->irq);
#endif
}
int irq_do_set_affinity(struct irq_data *data, const struct cpumask *mask,
bool force)
{
@ -181,6 +194,7 @@ int irq_do_set_affinity(struct irq_data *data, const struct cpumask *mask,
case IRQ_SET_MASK_OK_DONE:
cpumask_copy(desc->irq_common_data.affinity, mask);
case IRQ_SET_MASK_OK_NOCOPY:
irq_validate_effective_affinity(data);
irq_set_thread_affinity(desc);
ret = 0;
}