genirq: Add IRQCHIP_SET_TYPE_MASKED flag
irq_chips, which require to mask the chip before changing the trigger
type should set this flag. So the core takes care of it and the
requirement for looking into desc->status in the chip goes away.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Walleij <linus.walleij@stericsson.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index b5de828..50809c7 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -554,8 +554,8 @@
int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
unsigned long flags)
{
- int ret;
struct irq_chip *chip = desc->irq_data.chip;
+ int ret, unmask = 0;
if (!chip || !chip->irq_set_type) {
/*
@@ -568,6 +568,14 @@
}
flags &= IRQ_TYPE_SENSE_MASK;
+
+ if (chip->flags & IRQCHIP_SET_TYPE_MASKED) {
+ if (!(desc->istate & IRQS_MASKED))
+ mask_irq(desc);
+ if (!(desc->istate & IRQS_DISABLED))
+ unmask = 1;
+ }
+
/* caller masked out all except trigger mode flags */
ret = chip->irq_set_type(&desc->irq_data, flags);
@@ -588,11 +596,13 @@
if (chip != desc->irq_data.chip)
irq_chip_set_defaults(desc->irq_data.chip);
- return 0;
+ ret = 0;
default:
pr_err("setting trigger mode %lu for irq %u failed (%pF)\n",
flags, irq, chip->irq_set_type);
}
+ if (unmask)
+ unmask_irq(desc);
return ret;
}
@@ -669,7 +679,7 @@
#ifdef CONFIG_SMP
/*
- * Check whether we need to change the affinity of the interrupt thread.
+ * Check whether we need to chasnge the affinity of the interrupt thread.
*/
static void
irq_thread_check_affinity(struct irq_desc *desc, struct irqaction *action)