1 files changed, 12 insertions, 2 deletions

diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
index 869c466e6258..b5645c4462cf 100644
--- a/arch/arm/kernel/irq.c
+++ b/arch/arm/kernel/irq.c
@@ -684,8 +684,12 @@ int setup_irq(unsigned int irq, struct irqaction *new)
         spin_lock_irqsave(&irq_controller_lock, flags);
         p = &desc->action;
         if ((old = *p) != NULL) {
-                /* Can't share interrupts unless both agree to */
-                if (!(old->flags & new->flags & SA_SHIRQ)) {
+                /*
+                 * Can't share interrupts unless both agree to and are
+                 * the same type.
+                 */
+                if (!(old->flags & new->flags & SA_SHIRQ) ||
+                    (~old->flags & new->flags) & SA_TRIGGER_MASK) {
                         spin_unlock_irqrestore(&irq_controller_lock, flags);
                         return -EBUSY;
                 }
@@ -705,6 +709,12 @@ int setup_irq(unsigned int irq, struct irqaction *new)
                 desc->running = 0;
                 desc->pending = 0;
                 desc->disable_depth = 1;
+
+                if (new->flags & SA_TRIGGER_MASK) {
+                        unsigned int type = new->flags & SA_TRIGGER_MASK;
+                        desc->chip->set_type(irq, type);
+                }
+
                 if (!desc->noautoenable) {
                         desc->disable_depth = 0;
                         desc->chip->unmask(irq);