1 files changed, 10 insertions, 7 deletions

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 77a51be36010..ae1b684e048c 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -596,26 +596,29 @@ int request_irq(unsigned int irq, irq_handler_t handler,
         action->next = NULL;
         action->dev_id = dev_id;
 
+        retval = setup_irq(irq, action);
+        if (retval)
+                kfree(action);
+
 #ifdef CONFIG_DEBUG_SHIRQ
         if (irqflags & IRQF_SHARED) {
                 /*
                  * It's a shared IRQ -- the driver ought to be prepared for it
                  * to happen immediately, so let's make sure....
-                 * We do this before actually registering it, to make sure that
-                 * a 'real' IRQ doesn't run in parallel with our fake
+                 * We disable the irq to make sure that a 'real' IRQ doesn't
+                 * run in parallel with our fake.
                  */
                 unsigned long flags;
 
+                disable_irq(irq);
                 local_irq_save(flags);
+
                 handler(irq, dev_id);
+
                 local_irq_restore(flags);
+                enable_irq(irq);
         }
 #endif
-
-        retval = setup_irq(irq, action);
-        if (retval)
-                kfree(action);
-
         return retval;
 }
 EXPORT_SYMBOL(request_irq);