path: root/kernel
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authorStephen Boyd <>2020-02-06 11:15:21 -0800
committerThomas Gleixner <>2020-02-07 21:37:08 +0100
commitf9f21cea311340f38074ff93a8d89b4a9cae6bcc (patch)
tree141cac3361e55e0c64f2d5a9b3e9ef647ee78b0f /kernel
parent90568ecf561540fa330511e21fcd823b0c3829c6 (diff)
genirq: Clarify that irq wake state is orthogonal to enable/disable
There's some confusion around if an irq that's disabled with disable_irq() can still wake the system from sleep states such as "suspend to RAM". Clarify this in the kernel documentation for irq_set_irq_wake() so that it's clear that an irq can be disabled and still wake the system if it has been marked for wakeup. Signed-off-by: Stephen Boyd <> Signed-off-by: Thomas Gleixner <> Reviewed-by: Douglas Anderson <> Link:
Diffstat (limited to 'kernel')
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 818b2802d3e7..3089a60ea8f9 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -731,6 +731,13 @@ static int set_irq_wake_real(unsigned int irq, unsigned int on)
* Wakeup mode lets this IRQ wake the system from sleep
* states like "suspend to RAM".
+ *
+ * Note: irq enable/disable state is completely orthogonal
+ * to the enable/disable state of irq wake. An irq can be
+ * disabled with disable_irq() and still wake the system as
+ * long as the irq has wake enabled. If this does not hold,
+ * then the underlying irq chip and the related driver need
+ * to be investigated.
int irq_set_irq_wake(unsigned int irq, unsigned int on)