[patch 48/55] genirq: Split out irq_startup() code

From: Thomas Gleixner
Date: Mon Jun 19 2017 - 20:02:46 EST


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

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
kernel/irq/chip.c | 29 ++++++++++++++++++-----------
1 file changed, 18 insertions(+), 11 deletions(-)

--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -195,6 +195,23 @@ static void irq_state_set_started(struct
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, b
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);