From dc5f219e88294b93009eef946251251ffffb6d60 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 4 Feb 2011 13:19:20 +0100
Subject: genirq: Add IRQF_FORCE_RESUME
Xen needs to reenable interrupts which are marked IRQF_NO_SUSPEND in the
resume path. Add a flag to force the reenabling in the resume code.
Tested-and-acked-by: Ian Campbell <Ian.Campbell@eu.citrix.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
kernel/irq/manage.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
(limited to 'kernel/irq/manage.c')
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 0caa59f747d..b4198ee8cfd 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -282,8 +282,17 @@ EXPORT_SYMBOL(disable_irq);
void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume)
{
- if (resume)
+ if (resume) {
+ if (!(desc->status & IRQ_SUSPENDED)) {
+ if (!desc->action)
+ return;
+ if (!(desc->action->flags & IRQF_FORCE_RESUME))
+ return;
+ /* Pretend that it got disabled ! */
+ desc->depth++;
+ }
desc->status &= ~IRQ_SUSPENDED;
+ }
switch (desc->depth) {
case 0:
--
cgit v1.2.3-70-g09d2