From: Thomas Gleixner <[email protected]>
enable platforms to disable the automatic enabling of freshly set up irqs.
Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
---
include/linux/irq.h | 1 +
kernel/irq/manage.c | 18 +++++++++++-------
2 files changed, 12 insertions(+), 7 deletions(-)
Index: linux-genirq.q/include/linux/irq.h
===================================================================
--- linux-genirq.q.orig/include/linux/irq.h
+++ linux-genirq.q/include/linux/irq.h
@@ -42,6 +42,7 @@
#define IRQ_NOPROBE 512 /* IRQ is not valid for probing */
#define IRQ_NOREQUEST 1024 /* IRQ cannot be requested */
+#define IRQ_NOAUTOEN 2048 /* IRQ will not be enabled on request irq */
/**
* struct hw_interrupt_type - hardware interrupt type descriptor
*
Index: linux-genirq.q/kernel/irq/manage.c
===================================================================
--- linux-genirq.q.orig/kernel/irq/manage.c
+++ linux-genirq.q/kernel/irq/manage.c
@@ -216,13 +216,17 @@ int setup_irq(unsigned int irq, struct i
desc->status |= IRQ_PER_CPU;
#endif
if (!shared) {
- desc->depth = 0;
- desc->status &= ~(IRQ_DISABLED | IRQ_AUTODETECT |
- IRQ_WAITING | IRQ_INPROGRESS);
- if (desc->handler->startup)
- desc->handler->startup(irq);
- else
- desc->handler->enable(irq);
+ desc->status &= ~(IRQ_AUTODETECT | IRQ_WAITING |
+ IRQ_INPROGRESS);
+
+ if (!(desc->status & IRQ_NOAUTOEN)) {
+ desc->depth = 0;
+ desc->status &= ~IRQ_DISABLED;
+ if (desc->handler->startup)
+ desc->handler->startup(irq);
+ else
+ desc->handler->enable(irq);
+ }
}
spin_unlock_irqrestore(&desc->lock, flags);
-
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