MSI: Give archs the option to allocate all MSI/Xs at once.

[powerpc.git] / drivers / input / gameport / gameport.c

diff --git a/drivers/input/gameport/gameport.c b/drivers/input/gameport/gameport.c
index 36644bf..bd686a2 100644 (file)
--- a/drivers/input/gameport/gameport.c
+++ b/drivers/input/gameport/gameport.c
@@ -23,6 +23,7 @@
 #include <linux/kthread.h>
 #include <linux/sched.h>       /* HZ */
 #include <linux/mutex.h>
+#include <linux/freezer.h>
 
 /*#include <asm/io.h>*/
 
@@ -53,6 +54,7 @@ static LIST_HEAD(gameport_list);
 
 static struct bus_type gameport_bus;
 
+static void gameport_add_driver(struct gameport_driver *drv);
 static void gameport_add_port(struct gameport *gameport);
 static void gameport_destroy_port(struct gameport *gameport);
 static void gameport_reconnect_port(struct gameport *gameport);
@@ -188,32 +190,40 @@ static void gameport_run_poll_handler(unsigned long d)
  * Basic gameport -> driver core mappings
  */
 
-static void gameport_bind_driver(struct gameport *gameport, struct gameport_driver *drv)
+static int gameport_bind_driver(struct gameport *gameport, struct gameport_driver *drv)
 {
-       down_write(&gameport_bus.subsys.rwsem);
+       int error;
 
        gameport->dev.driver = &drv->driver;
        if (drv->connect(gameport, drv)) {
                gameport->dev.driver = NULL;
-               goto out;
+               return -ENODEV;
        }
-       device_bind_driver(&gameport->dev);
-out:
-       up_write(&gameport_bus.subsys.rwsem);
-}
 
-static void gameport_release_driver(struct gameport *gameport)
-{
-       down_write(&gameport_bus.subsys.rwsem);
-       device_release_driver(&gameport->dev);
-       up_write(&gameport_bus.subsys.rwsem);
+       error = device_bind_driver(&gameport->dev);
+       if (error) {
+               printk(KERN_WARNING
+                       "gameport: device_bind_driver() failed "
+                       "for %s (%s) and %s, error: %d\n",
+                       gameport->phys, gameport->name,
+                       drv->description, error);
+               drv->disconnect(gameport);
+               gameport->dev.driver = NULL;
+               return error;
+       }
+
+       return 0;
 }
 
 static void gameport_find_driver(struct gameport *gameport)
 {
-       down_write(&gameport_bus.subsys.rwsem);
-       device_attach(&gameport->dev);
-       up_write(&gameport_bus.subsys.rwsem);
+       int error;
+
+       error = device_attach(&gameport->dev);
+       if (error < 0)
+               printk(KERN_WARNING
+                       "gameport: device_attach() failed for %s (%s), error: %d\n",
+                       gameport->phys, gameport->name, error);
 }
 
 
@@ -316,7 +326,6 @@ static void gameport_remove_duplicate_events(struct gameport_event *event)
        spin_unlock_irqrestore(&gameport_event_lock, flags);
 }
 
-
 static struct gameport_event *gameport_get_event(void)
 {
        struct gameport_event *event;
@@ -342,7 +351,6 @@ static struct gameport_event *gameport_get_event(void)
 static void gameport_handle_event(void)
 {
        struct gameport_event *event;
-       struct gameport_driver *gameport_drv;
 
        mutex_lock(&gameport_mutex);
 
@@ -369,8 +377,7 @@ static void gameport_handle_event(void)
                                break;
 
                        case GAMEPORT_REGISTER_DRIVER:
-                               gameport_drv = event->object;
-                               driver_register(&gameport_drv->driver);
+                               gameport_add_driver(event->object);
                                break;
 
                        default:
@@ -464,13 +471,12 @@ static ssize_t gameport_rebind_driver(struct device *dev, struct device_attribut
 {
        struct gameport *gameport = to_gameport_port(dev);
        struct device_driver *drv;
-       int retval;
+       int error;
 
-       retval = mutex_lock_interruptible(&gameport_mutex);
-       if (retval)
-               return retval;
+       error = mutex_lock_interruptible(&gameport_mutex);
+       if (error)
+               return error;
 
-       retval = count;
        if (!strncmp(buf, "none", count)) {
                gameport_disconnect_port(gameport);
        } else if (!strncmp(buf, "reconnect", count)) {
@@ -480,15 +486,15 @@ static ssize_t gameport_rebind_driver(struct device *dev, struct device_attribut
                gameport_find_driver(gameport);
        } else if ((drv = driver_find(buf, &gameport_bus)) != NULL) {
                gameport_disconnect_port(gameport);
-               gameport_bind_driver(gameport, to_gameport_driver(drv));
+               error = gameport_bind_driver(gameport, to_gameport_driver(drv));
                put_driver(drv);
        } else {
-               retval = -EINVAL;
+               error = -EINVAL;
        }
 
        mutex_unlock(&gameport_mutex);
 
-       return retval;
+       return error ? error : count;
 }
 
 static struct device_attribute gameport_device_attrs[] = {
@@ -532,6 +538,7 @@ static void gameport_init_port(struct gameport *gameport)
        if (gameport->parent)
                gameport->dev.parent = &gameport->parent->dev;
 
+       INIT_LIST_HEAD(&gameport->node);
        spin_lock_init(&gameport->timer_lock);
        init_timer(&gameport->poll_timer);
        gameport->poll_timer.function = gameport_run_poll_handler;
@@ -544,6 +551,8 @@ static void gameport_init_port(struct gameport *gameport)
  */
 static void gameport_add_port(struct gameport *gameport)
 {
+       int error;
+
        if (gameport->parent)
                gameport->parent->child = gameport;
 
@@ -558,8 +567,13 @@ static void gameport_add_port(struct gameport *gameport)
                printk(KERN_INFO "gameport: %s is %s, speed %dkHz\n",
                        gameport->name, gameport->phys, gameport->speed);
 
-       device_add(&gameport->dev);
-       gameport->registered = 1;
+       error = device_add(&gameport->dev);
+       if (error)
+               printk(KERN_ERR
+                       "gameport: device_add() failed for %s (%s), error: %d\n",
+                       gameport->phys, gameport->name, error);
+       else
+               gameport->registered = 1;
 }
 
 /*
@@ -583,10 +597,11 @@ static void gameport_destroy_port(struct gameport *gameport)
 
        if (gameport->registered) {
                device_del(&gameport->dev);
-               list_del_init(&gameport->node);
                gameport->registered = 0;
        }
 
+       list_del_init(&gameport->node);
+
        gameport_remove_pending_events(gameport);
        put_device(&gameport->dev);
 }
@@ -627,7 +642,7 @@ static void gameport_disconnect_port(struct gameport *gameport)
                do {
                        parent = s->parent;
 
-                       gameport_release_driver(s);
+                       device_release_driver(&s->dev);
                        gameport_destroy_port(s);
                } while ((s = parent) != gameport);
        }
@@ -635,7 +650,7 @@ static void gameport_disconnect_port(struct gameport *gameport)
        /*
         * Ok, no children left, now disconnect this port
         */
-       gameport_release_driver(gameport);
+       device_release_driver(&gameport->dev);
 }
 
 void gameport_rescan(struct gameport *gameport)
@@ -703,11 +718,16 @@ static int gameport_driver_remove(struct device *dev)
        return 0;
 }
 
-static struct bus_type gameport_bus = {
-       .name = "gameport",
-       .probe = gameport_driver_probe,
-       .remove = gameport_driver_remove,
-};
+static void gameport_add_driver(struct gameport_driver *drv)
+{
+       int error;
+
+       error = driver_register(&drv->driver);
+       if (error)
+               printk(KERN_ERR
+                       "gameport: driver_register() failed for %s, error: %d\n",
+                       drv->driver.name, error);
+}
 
 void __gameport_register_driver(struct gameport_driver *drv, struct module *owner)
 {
@@ -743,6 +763,15 @@ static int gameport_bus_match(struct device *dev, struct device_driver *drv)
        return !gameport_drv->ignore;
 }
 
+static struct bus_type gameport_bus = {
+       .name           = "gameport",
+       .dev_attrs      = gameport_device_attrs,
+       .drv_attrs      = gameport_driver_attrs,
+       .match          = gameport_bus_match,
+       .probe          = gameport_driver_probe,
+       .remove         = gameport_driver_remove,
+};
+
 static void gameport_set_drv(struct gameport *gameport, struct gameport_driver *drv)
 {
        mutex_lock(&gameport->drv_mutex);
@@ -752,7 +781,6 @@ static void gameport_set_drv(struct gameport *gameport, struct gameport_driver *
 
 int gameport_open(struct gameport *gameport, struct gameport_driver *drv, int mode)
 {
-
        if (gameport->open) {
                if (gameport->open(gameport, mode)) {
                        return -1;
@@ -778,17 +806,22 @@ void gameport_close(struct gameport *gameport)
 
 static int __init gameport_init(void)
 {
+       int error;
+
+       error = bus_register(&gameport_bus);
+       if (error) {
+               printk(KERN_ERR "gameport: failed to register gameport bus, error: %d\n", error);
+               return error;
+       }
+
        gameport_task = kthread_run(gameport_thread, NULL, "kgameportd");
        if (IS_ERR(gameport_task)) {
-               printk(KERN_ERR "gameport: Failed to start kgameportd\n");
-               return PTR_ERR(gameport_task);
+               bus_unregister(&gameport_bus);
+               error = PTR_ERR(gameport_task);
+               printk(KERN_ERR "gameport: Failed to start kgameportd, error: %d\n", error);
+               return error;
        }
 
-       gameport_bus.dev_attrs = gameport_device_attrs;
-       gameport_bus.drv_attrs = gameport_driver_attrs;
-       gameport_bus.match = gameport_bus_match;
-       bus_register(&gameport_bus);
-
        return 0;
 }