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genirq: Move initial affinity setup to irq_startup()

Browse source 
The startup vs. setaffinity ordering of interrupts depends on the
IRQF_NOAUTOEN flag. Chained interrupts are not getting any affinity
assignment at all.

A regular interrupt is started up and then the affinity is set. A
IRQF_NOAUTOEN marked interrupt is not started up, but the affinity is set
nevertheless.

Move the affinity setup to startup_irq() so the ordering is always the same
and chained interrupts get the proper default affinity assigned as well.

Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Jens Axboe <[email protected]>
Cc: Marc Zyngier <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Keith Busch <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
This commit is contained in:
Thomas Gleixner 2017-06-20 01:37:23 +02:00
commit 2e051552df
2 changed files with 8 additions and 9 deletions
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2
kernel/irq/chip.c
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@ -213,6 +213,8 @@ int irq_startup(struct irq_desc *desc, bool resend)
irq_enable(desc);
}
irq_state_set_started(desc);
/* Set default affinity mask once everything is setup */
irq_setup_affinity(desc);
}
if (resend)

15
kernel/irq/manage.c
View file

@ -1327,6 +1327,12 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
if (new->flags & IRQF_ONESHOT)
desc->istate |= IRQS_ONESHOT;
/* Exclude IRQ from balancing if requested */
if (new->flags & IRQF_NOBALANCING) {
irq_settings_set_no_balancing(desc);
irqd_set(&desc->irq_data, IRQD_NO_BALANCING);
}
if (irq_settings_can_autoenable(desc)) {
irq_startup(desc, true);
} else {
@ -1341,15 +1347,6 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
desc->depth = 1;
}
/* Exclude IRQ from balancing if requested */
if (new->flags & IRQF_NOBALANCING) {
irq_settings_set_no_balancing(desc);
irqd_set(&desc->irq_data, IRQD_NO_BALANCING);
}
/* Set default affinity mask once everything is setup */
irq_setup_affinity(desc);
} else if (new->flags & IRQF_TRIGGER_MASK) {
unsigned int nmsk = new->flags & IRQF_TRIGGER_MASK;
unsigned int omsk = irqd_get_trigger_type(&desc->irq_data);