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genirq: Split out irq_startup() code 

Split out the inner workings of irq_startup() so it can be reused to handle
managed interrupts gracefully.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Christoph Hellwig <hch@lst.de>
Link: http://lkml.kernel.org/r/20170619235447.033235144@linutronix.de
This commit is contained in:
Thomas Gleixner 2017-06-20 01:37:48 +02:00
parent 54fdf6a087
commit 708d174b6c
1 changed files with 18 additions and 11 deletions
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29
kernel/irq/chip.c
View File

@ -195,6 +195,23 @@ static void irq_state_set_started(struct irq_desc *desc)
irqd_set(&desc->irq_data, IRQD_IRQ_STARTED);
}
static int __irq_startup(struct irq_desc *desc)
{
struct irq_data *d = irq_desc_get_irq_data(desc);
int ret = 0;
irq_domain_activate_irq(d);
if (d->chip->irq_startup) {
ret = d->chip->irq_startup(d);
irq_state_clr_disabled(desc);
irq_state_clr_masked(desc);
} else {
irq_enable(desc);
}
irq_state_set_started(desc);
return ret;
}
int irq_startup(struct irq_desc *desc, bool resend)
{
int ret = 0;
@ -204,19 +221,9 @@ int irq_startup(struct irq_desc *desc, bool resend)
if (irqd_is_started(&desc->irq_data)) {
irq_enable(desc);
} else {
irq_domain_activate_irq(&desc->irq_data);
if (desc->irq_data.chip->irq_startup) {
ret = desc->irq_data.chip->irq_startup(&desc->irq_data);
irq_state_clr_disabled(desc);
irq_state_clr_masked(desc);
} else {
irq_enable(desc);
}
irq_state_set_started(desc);
/* Set default affinity mask once everything is setup */
ret = __irq_startup(desc);
irq_setup_affinity(desc);
}
if (resend)
check_irq_resend(desc);