Re: [PATCH] handle IRQ_PENDING for simple irq handler
Note, that should have been [PATCH RT], this is NOT for mainline! -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH] handle IRQ_PENDING for simple irq handler
With the IO-APIC pcix hack (level=>edge masking), we can receive
interrupts while masked. But these interrupts might be missed.
Also, normal "simple" interrupts might be missed too on leaving of
thread handler.
Signed-off-by: Steven Rostedt <[EMAIL PROTECTED]>
Index: linux-2.6.21-rt-hack/kernel/irq/manage.c
===
--- linux-2.6.21-rt-hack.orig/kernel/irq/manage.c
+++ linux-2.6.21-rt-hack/kernel/irq/manage.c
@@ -628,14 +628,17 @@ static void thread_simple_irq(irq_desc_t
unsigned int irq = desc - irq_desc;
irqreturn_t action_ret;
- if (action && !desc->depth) {
+ do {
+ if (!action || desc->depth)
+ break;
+ desc->status &= ~IRQ_PENDING;
spin_unlock(>lock);
action_ret = handle_IRQ_event(irq, action);
cond_resched_hardirq_context();
spin_lock_irq(>lock);
if (!noirqdebug)
note_interrupt(irq, desc, action_ret);
- }
+ } while (desc->status & IRQ_PENDING);
desc->status &= ~IRQ_INPROGRESS;
}
--
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Re: [PATCH] handle IRQ_PENDING for simple irq handler
Note, that should have been [PATCH RT], this is NOT for mainline! -- Steve -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH] handle IRQ_PENDING for simple irq handler
With the IO-APIC pcix hack (level=edge masking), we can receive
interrupts while masked. But these interrupts might be missed.
Also, normal simple interrupts might be missed too on leaving of
thread handler.
Signed-off-by: Steven Rostedt [EMAIL PROTECTED]
Index: linux-2.6.21-rt-hack/kernel/irq/manage.c
===
--- linux-2.6.21-rt-hack.orig/kernel/irq/manage.c
+++ linux-2.6.21-rt-hack/kernel/irq/manage.c
@@ -628,14 +628,17 @@ static void thread_simple_irq(irq_desc_t
unsigned int irq = desc - irq_desc;
irqreturn_t action_ret;
- if (action !desc-depth) {
+ do {
+ if (!action || desc-depth)
+ break;
+ desc-status = ~IRQ_PENDING;
spin_unlock(desc-lock);
action_ret = handle_IRQ_event(irq, action);
cond_resched_hardirq_context();
spin_lock_irq(desc-lock);
if (!noirqdebug)
note_interrupt(irq, desc, action_ret);
- }
+ } while (desc-status IRQ_PENDING);
desc-status = ~IRQ_INPROGRESS;
}
--
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