Merge branch 'for-linus' of git://git.kernel.dk/linux-block

[pandora-kernel.git] / kernel / irq / manage.c

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 3f9cd47..9b956fa 100644 (file)
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -883,6 +883,8 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
 
        if (desc->irq_data.chip == &no_irq_chip)
                return -ENOSYS;
+       if (!try_module_get(desc->owner))
+               return -ENODEV;
        /*
         * Some drivers like serial.c use request_irq() heavily,
         * so we have to be careful not to interfere with a
@@ -906,8 +908,10 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
         */
        nested = irq_settings_is_nested_thread(desc);
        if (nested) {
-               if (!new->thread_fn)
-                       return -EINVAL;
+               if (!new->thread_fn) {
+                       ret = -EINVAL;
+                       goto out_mput;
+               }
                /*
                 * Replace the primary handler which was provided from
                 * the driver for non nested interrupt handling by the
@@ -929,8 +933,10 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
 
                t = kthread_create(irq_thread, new, "irq/%d-%s", irq,
                                   new->name);
-               if (IS_ERR(t))
-                       return PTR_ERR(t);
+               if (IS_ERR(t)) {
+                       ret = PTR_ERR(t);
+                       goto out_mput;
+               }
                /*
                 * We keep the reference to the task struct even if
                 * the thread dies to avoid that the interrupt code
@@ -1095,6 +1101,8 @@ out_thread:
                        kthread_stop(t);
                put_task_struct(t);
        }
+out_mput:
+       module_put(desc->owner);
        return ret;
 }
 
@@ -1203,6 +1211,7 @@ static struct irqaction *__free_irq(unsigned int irq, void *dev_id)
                put_task_struct(action->thread);
        }
 
+       module_put(desc->owner);
        return action;
 }
 
@@ -1322,7 +1331,6 @@ int request_threaded_irq(unsigned int irq, irq_handler_t handler,
                if (!thread_fn)
                        return -EINVAL;
                handler = irq_default_primary_handler;
-               irqflags |= IRQF_ONESHOT;
        }
 
        action = kzalloc(sizeof(struct irqaction), GFP_KERNEL);