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-rw-r--r--kernel/irq/manage.c23
1 files changed, 18 insertions, 5 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 97d5559997d2..6edfcef291e8 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -204,10 +204,14 @@ int setup_irq(unsigned int irq, struct irqaction * new)
p = &desc->action;
if ((old = *p) != NULL) {
/* Can't share interrupts unless both agree to */
- if (!(old->flags & new->flags & SA_SHIRQ)) {
- spin_unlock_irqrestore(&desc->lock,flags);
- return -EBUSY;
- }
+ if (!(old->flags & new->flags & SA_SHIRQ))
+ goto mismatch;
+
+#if defined(ARCH_HAS_IRQ_PER_CPU) && defined(SA_PERCPU_IRQ)
+ /* All handlers must agree on per-cpuness */
+ if ((old->flags & IRQ_PER_CPU) != (new->flags & IRQ_PER_CPU))
+ goto mismatch;
+#endif
/* add new interrupt at end of irq queue */
do {
@@ -218,7 +222,10 @@ int setup_irq(unsigned int irq, struct irqaction * new)
}
*p = new;
-
+#if defined(ARCH_HAS_IRQ_PER_CPU) && defined(SA_PERCPU_IRQ)
+ if (new->flags & SA_PERCPU_IRQ)
+ desc->status |= IRQ_PER_CPU;
+#endif
if (!shared) {
desc->depth = 0;
desc->status &= ~(IRQ_DISABLED | IRQ_AUTODETECT |
@@ -236,6 +243,12 @@ int setup_irq(unsigned int irq, struct irqaction * new)
register_handler_proc(irq, new);
return 0;
+
+mismatch:
+ spin_unlock_irqrestore(&desc->lock, flags);
+ printk(KERN_ERR "%s: irq handler mismatch\n", __FUNCTION__);
+ dump_stack();
+ return -EBUSY;
}
/**