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authorThomas Gleixner <tglx@linutronix.de>2017-11-14 11:23:05 +0100
committerThomas Gleixner <tglx@linutronix.de>2017-11-14 11:23:05 +0100
commit41cc30412d6692c25506bf2d4e65c4364c70c10a (patch)
treed9adeb9c94a54998002d46aeebb99f86f1232016 /kernel/irq/manage.c
parentb29c6ef7bb1257853c1e31616d84f55e561cf631 (diff)
parent29f411399aaa2e53882858e01d21981f3c301e2a (diff)
Merge tag 'irqchip-4.15-4' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/urgent
Pull irqchip updates for 4.15, take #4 from Marc Zyngier - A core irq fix for legacy cases where the irq trigger is not reported by firmware - A couple of GICv3/4 fixes (Kconfig, of-node refcount, error handling) - Trivial pr_err fixes
Diffstat (limited to 'kernel/irq/manage.c')
-rw-r--r--kernel/irq/manage.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 2ff1c0c82fc9..0f922729bab9 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -1246,7 +1246,18 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
* set the trigger type must match. Also all must
* agree on ONESHOT.
*/
- unsigned int oldtype = irqd_get_trigger_type(&desc->irq_data);
+ unsigned int oldtype;
+
+ /*
+ * If nobody did set the configuration before, inherit
+ * the one provided by the requester.
+ */
+ if (irqd_trigger_type_was_set(&desc->irq_data)) {
+ oldtype = irqd_get_trigger_type(&desc->irq_data);
+ } else {
+ oldtype = new->flags & IRQF_TRIGGER_MASK;
+ irqd_set_trigger_type(&desc->irq_data, oldtype);
+ }
if (!((old->flags & new->flags) & IRQF_SHARED) ||
(oldtype != (new->flags & IRQF_TRIGGER_MASK)) ||