aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--drivers/base/bus.c77
1 files changed, 40 insertions, 37 deletions
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index d7c5ea246a0..7d8a7ce73fb 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -518,34 +518,36 @@ int bus_add_driver(struct device_driver *drv)
struct bus_type * bus = get_bus(drv->bus);
int error = 0;
- if (bus) {
- pr_debug("bus %s: add driver %s\n", bus->name, drv->name);
- error = kobject_set_name(&drv->kobj, "%s", drv->name);
- if (error)
- goto out_put_bus;
- drv->kobj.kset = &bus->drivers;
- if ((error = kobject_register(&drv->kobj)))
- goto out_put_bus;
-
- error = driver_attach(drv);
- if (error)
- goto out_unregister;
- klist_add_tail(&drv->knode_bus, &bus->klist_drivers);
- module_add_driver(drv->owner, drv);
-
- error = driver_add_attrs(bus, drv);
- if (error) {
- /* How the hell do we get out of this pickle? Give up */
- printk(KERN_ERR "%s: driver_add_attrs(%s) failed\n",
- __FUNCTION__, drv->name);
- }
- error = add_bind_files(drv);
- if (error) {
- /* Ditto */
- printk(KERN_ERR "%s: add_bind_files(%s) failed\n",
- __FUNCTION__, drv->name);
- }
+ if (!bus)
+ return 0;
+
+ pr_debug("bus %s: add driver %s\n", bus->name, drv->name);
+ error = kobject_set_name(&drv->kobj, "%s", drv->name);
+ if (error)
+ goto out_put_bus;
+ drv->kobj.kset = &bus->drivers;
+ if ((error = kobject_register(&drv->kobj)))
+ goto out_put_bus;
+
+ error = driver_attach(drv);
+ if (error)
+ goto out_unregister;
+ klist_add_tail(&drv->knode_bus, &bus->klist_drivers);
+ module_add_driver(drv->owner, drv);
+
+ error = driver_add_attrs(bus, drv);
+ if (error) {
+ /* How the hell do we get out of this pickle? Give up */
+ printk(KERN_ERR "%s: driver_add_attrs(%s) failed\n",
+ __FUNCTION__, drv->name);
+ }
+ error = add_bind_files(drv);
+ if (error) {
+ /* Ditto */
+ printk(KERN_ERR "%s: add_bind_files(%s) failed\n",
+ __FUNCTION__, drv->name);
}
+
return error;
out_unregister:
kobject_unregister(&drv->kobj);
@@ -565,16 +567,17 @@ out_put_bus:
void bus_remove_driver(struct device_driver * drv)
{
- if (drv->bus) {
- remove_bind_files(drv);
- driver_remove_attrs(drv->bus, drv);
- klist_remove(&drv->knode_bus);
- pr_debug("bus %s: remove driver %s\n", drv->bus->name, drv->name);
- driver_detach(drv);
- module_remove_driver(drv);
- kobject_unregister(&drv->kobj);
- put_bus(drv->bus);
- }
+ if (!drv->bus)
+ return;
+
+ remove_bind_files(drv);
+ driver_remove_attrs(drv->bus, drv);
+ klist_remove(&drv->knode_bus);
+ pr_debug("bus %s: remove driver %s\n", drv->bus->name, drv->name);
+ driver_detach(drv);
+ module_remove_driver(drv);
+ kobject_unregister(&drv->kobj);
+ put_bus(drv->bus);
}