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-rw-r--r--drivers/xen/events.c29
1 files changed, 9 insertions, 20 deletions
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 459121c53251..e53fd60fe4b8 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -595,25 +595,6 @@ irqreturn_t xen_debug_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
-
-static void xen_do_irq(unsigned irq, struct pt_regs *regs)
-{
- struct pt_regs *old_regs = set_irq_regs(regs);
-
- if (WARN_ON(irq == -1))
- return;
-
- exit_idle();
- irq_enter();
-
- //printk("cpu %d handling irq %d\n", smp_processor_id(), info->irq);
- handle_irq(irq, regs);
-
- irq_exit();
-
- set_irq_regs(old_regs);
-}
-
/*
* Search the CPUs pending events bitmasks. For each one found, map
* the event number to an irq, and feed it into do_IRQ() for
@@ -626,11 +607,15 @@ static void xen_do_irq(unsigned irq, struct pt_regs *regs)
void xen_evtchn_do_upcall(struct pt_regs *regs)
{
int cpu = get_cpu();
+ struct pt_regs *old_regs = set_irq_regs(regs);
struct shared_info *s = HYPERVISOR_shared_info;
struct vcpu_info *vcpu_info = __get_cpu_var(xen_vcpu);
static DEFINE_PER_CPU(unsigned, nesting_count);
unsigned count;
+ exit_idle();
+ irq_enter();
+
do {
unsigned long pending_words;
@@ -654,7 +639,8 @@ void xen_evtchn_do_upcall(struct pt_regs *regs)
int port = (word_idx * BITS_PER_LONG) + bit_idx;
int irq = evtchn_to_irq[port];
- xen_do_irq(irq, regs);
+ if (irq != -1)
+ handle_irq(irq, regs);
}
}
@@ -665,6 +651,9 @@ void xen_evtchn_do_upcall(struct pt_regs *regs)
} while(count != 1);
out:
+ irq_exit();
+ set_irq_regs(old_regs);
+
put_cpu();
}