Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6:
  driver core: kmalloc() failure check in driver_probe_device
  Driver core: bus: remove indentation level
  Driver core: Don't ignore error returns from probing
  Driver core: Don't leak 'old_class_name' in drivers/base/core.c::device_rename()
  driver core fixes: sysfs_create_group() retval in topology.c
  driver core fixes: device_create_file() retval check in dmapool.c
  driver core fixes: device_add() cleanup on error
  driver core fixes: bus_add_device() cleanup on error
  driver core fixes: bus_add_attrs() retval check
  driver core fixes: sysfs_create_link() retval check in class.c
  sysfs: update obsolete comment in sysfs_update_file
  sysfs: remove duplicated dput in sysfs_update_file
  HOWTO: bug report addition
  Fix dev_printk() is now GPL-only
  Driver core: plug device probe memory leak
  Documentation: feature-removal-schedule typo

Documentation/HOWTO

@@ -395,6 +395,26 @@ bugme-janitor mailing list (every change in the bugzilla is mailed here)
 
 
 
+Managing bug reports
+--------------------
+
+One of the best ways to put into practice your hacking skills is by fixing
+bugs reported by other people. Not only you will help to make the kernel
+more stable, you'll learn to fix real world problems and you will improve
+your skills, and other developers will be aware of your presence. Fixing
+bugs is one of the best ways to get merits among other developers, because
+not many people like wasting time fixing other people's bugs.
+
+To work in the already reported bug reports, go to http://bugzilla.kernel.org.
+If you want to be advised of the future bug reports, you can subscribe to the
+bugme-new mailing list (only new bug reports are mailed here) or to the
+bugme-janitor mailing list (every change in the bugzilla is mailed here)
+
+	http://lists.osdl.org/mailman/listinfo/bugme-new
+	http://lists.osdl.org/mailman/listinfo/bugme-janitors
+
+
+
 Mailing lists
 -------------
 

Documentation/feature-removal-schedule.txt

@@ -255,7 +255,7 @@ Who:	Stephen Hemminger <shemminger@osdl.org>
 
 
 What:	PHYSDEVPATH, PHYSDEVBUS, PHYSDEVDRIVER in the uevent environment
-When:	Oktober 2008
+When:	October 2008
 Why:	The stacking of class devices makes these values misleading and
 	inconsistent.
 	Class devices should not carry any of these properties, and bus

drivers/base/bus.c

@@ -372,19 +372,30 @@ int bus_add_device(struct device * dev)
 		pr_debug("bus %s: add device %s\n", bus->name, dev->bus_id);
 		error = device_add_attrs(bus, dev);
 		if (error)
-			goto out;
+			goto out_put;
 		error = sysfs_create_link(&bus->devices.kobj,
 						&dev->kobj, dev->bus_id);
 		if (error)
-			goto out;
+			goto out_id;
 		error = sysfs_create_link(&dev->kobj,
 				&dev->bus->subsys.kset.kobj, "subsystem");
 		if (error)
-			goto out;
+			goto out_subsys;
 		error = sysfs_create_link(&dev->kobj,
 				&dev->bus->subsys.kset.kobj, "bus");
+		if (error)
+			goto out_deprecated;
 	}
-out:
+	return 0;
+
+out_deprecated:
+	sysfs_remove_link(&dev->kobj, "subsystem");
+out_subsys:
+	sysfs_remove_link(&bus->devices.kobj, dev->bus_id);
+out_id:
+	device_remove_attrs(bus, dev);
+out_put:
+	put_bus(dev->bus);
 	return error;
 }
 
@@ -428,8 +439,10 @@ void bus_remove_device(struct device * dev)
 		sysfs_remove_link(&dev->kobj, "bus");
 		sysfs_remove_link(&dev->bus->devices.kobj, dev->bus_id);
 		device_remove_attrs(dev->bus, dev);
-		dev->is_registered = 0;
-		klist_del(&dev->knode_bus);
+		if (dev->is_registered) {
+			dev->is_registered = 0;
+			klist_del(&dev->knode_bus);
+		}
 		pr_debug("bus %s: remove device %s\n", dev->bus->name, dev->bus_id);
 		device_release_driver(dev);
 		put_bus(dev->bus);
@@ -505,34 +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);
@@ -552,16 +567,17 @@ int bus_add_driver(struct device_driver *drv)
 
 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);
 }
 
 
@@ -732,11 +748,15 @@ int bus_register(struct bus_type * bus)
 
 	klist_init(&bus->klist_devices, klist_devices_get, klist_devices_put);
 	klist_init(&bus->klist_drivers, NULL, NULL);
-	bus_add_attrs(bus);
+	retval = bus_add_attrs(bus);
+	if (retval)
+		goto bus_attrs_fail;
 
 	pr_debug("bus type '%s' registered\n", bus->name);
 	return 0;
 
+bus_attrs_fail:
+	kset_unregister(&bus->drivers);
 bus_drivers_fail:
 	kset_unregister(&bus->devices);
 bus_devices_fail:

drivers/base/class.c

@@ -562,7 +562,10 @@ int class_device_add(struct class_device *class_dev)
 		goto out2;
 
 	/* add the needed attributes to this device */
-	sysfs_create_link(&class_dev->kobj, &parent_class->subsys.kset.kobj, "subsystem");
+	error = sysfs_create_link(&class_dev->kobj,
+				  &parent_class->subsys.kset.kobj, "subsystem");
+	if (error)
+		goto out3;
 	class_dev->uevent_attr.attr.name = "uevent";
 	class_dev->uevent_attr.attr.mode = S_IWUSR;
 	class_dev->uevent_attr.attr.owner = parent_class->owner;

drivers/base/core.c

@@ -44,7 +44,7 @@ const char *dev_driver_string(struct device *dev)
 	return dev->driver ? dev->driver->name :
 			(dev->bus ? dev->bus->name : "");
 }
-EXPORT_SYMBOL_GPL(dev_driver_string);
+EXPORT_SYMBOL(dev_driver_string);
 
 #define to_dev(obj) container_of(obj, struct device, kobj)
 #define to_dev_attr(_attr) container_of(_attr, struct device_attribute, attr)
@@ -433,14 +433,16 @@ int device_add(struct device *dev)
 	if (dev->driver)
 		dev->uevent_attr.attr.owner = dev->driver->owner;
 	dev->uevent_attr.store = store_uevent;
-	device_create_file(dev, &dev->uevent_attr);
+	error = device_create_file(dev, &dev->uevent_attr);
+	if (error)
+		goto attrError;
 
 	if (MAJOR(dev->devt)) {
 		struct device_attribute *attr;
 		attr = kzalloc(sizeof(*attr), GFP_KERNEL);
 		if (!attr) {
 			error = -ENOMEM;
-			goto PMError;
+			goto ueventattrError;
 		}
 		attr->attr.name = "dev";
 		attr->attr.mode = S_IRUGO;
@@ -450,7 +452,7 @@ int device_add(struct device *dev)
 		error = device_create_file(dev, attr);
 		if (error) {
 			kfree(attr);
-			goto attrError;
+			goto ueventattrError;
 		}
 
 		dev->devt_attr = attr;
@@ -477,7 +479,8 @@ int device_add(struct device *dev)
 	if ((error = bus_add_device(dev)))
 		goto BusError;
 	kobject_uevent(&dev->kobj, KOBJ_ADD);
-	bus_attach_device(dev);
+	if ((error = bus_attach_device(dev)))
+		goto AttachError;
 	if (parent)
 		klist_add_tail(&dev->knode_parent, &parent->klist_children);
 
@@ -496,6 +499,8 @@ int device_add(struct device *dev)
  	kfree(class_name);
 	put_device(dev);
 	return error;
+ AttachError:
+	bus_remove_device(dev);
  BusError:
 	device_pm_remove(dev);
  PMError:
@@ -507,6 +512,8 @@ int device_add(struct device *dev)
 		device_remove_file(dev, dev->devt_attr);
 		kfree(dev->devt_attr);
 	}
+ ueventattrError:
+	device_remove_file(dev, &dev->uevent_attr);
  attrError:
 	kobject_uevent(&dev->kobj, KOBJ_REMOVE);
 	kobject_del(&dev->kobj);
@@ -805,8 +812,10 @@ int device_rename(struct device *dev, char *new_name)
 
 	if (dev->class) {
 		old_symlink_name = kmalloc(BUS_ID_SIZE, GFP_KERNEL);
-		if (!old_symlink_name)
-			return -ENOMEM;
+		if (!old_symlink_name) {
+			error = -ENOMEM;
+			goto out_free_old_class;
+		}
 		strlcpy(old_symlink_name, dev->bus_id, BUS_ID_SIZE);
 	}
 
@@ -830,9 +839,10 @@ int device_rename(struct device *dev, char *new_name)
 	}
 	put_device(dev);
 
-	kfree(old_class_name);
 	kfree(new_class_name);
 	kfree(old_symlink_name);
+ out_free_old_class:
+	kfree(old_class_name);
 
 	return error;
 }

drivers/base/dd.c

@@ -171,6 +171,8 @@ int driver_probe_device(struct device_driver * drv, struct device * dev)
 		 drv->bus->name, dev->bus_id, drv->name);
 
 	data = kmalloc(sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
 	data->drv = drv;
 	data->dev = dev;
 
@@ -178,7 +180,7 @@ int driver_probe_device(struct device_driver * drv, struct device * dev)
 		probe_task = kthread_run(really_probe, data,
 					 "probe-%s", dev->bus_id);
 		if (IS_ERR(probe_task))
-			ret = PTR_ERR(probe_task);
+			ret = really_probe(data);
 	} else
 		ret = really_probe(data);
 

drivers/base/dmapool.c

@@ -141,11 +141,20 @@ dma_pool_create (const char *name, struct device *dev,
 	init_waitqueue_head (&retval->waitq);
 
 	if (dev) {
+		int ret;
+
 		down (&pools_lock);
 		if (list_empty (&dev->dma_pools))
-			device_create_file (dev, &dev_attr_pools);
+			ret = device_create_file (dev, &dev_attr_pools);
+		else
+			ret = 0;
 		/* note:  not currently insisting "name" be unique */
-		list_add (&retval->pools, &dev->dma_pools);
+		if (!ret)
+			list_add (&retval->pools, &dev->dma_pools);
+		else {
+			kfree(retval);
+			retval = NULL;
+		}
 		up (&pools_lock);
 	} else
 		INIT_LIST_HEAD (&retval->pools);

drivers/base/topology.c

@@ -97,8 +97,7 @@ static struct attribute_group topology_attr_group = {
 /* Add/Remove cpu_topology interface for CPU device */
 static int __cpuinit topology_add_dev(struct sys_device * sys_dev)
 {
-	sysfs_create_group(&sys_dev->kobj, &topology_attr_group);
-	return 0;
+	return sysfs_create_group(&sys_dev->kobj, &topology_attr_group);
 }
 
 static int __cpuinit topology_remove_dev(struct sys_device * sys_dev)

fs/sysfs/file.c

@@ -483,17 +483,12 @@ int sysfs_update_file(struct kobject * kobj, const struct attribute * attr)
 		    (victim->d_parent->d_inode == dir->d_inode)) {
 			victim->d_inode->i_mtime = CURRENT_TIME;
 			fsnotify_modify(victim);
-
-			/**
-			 * Drop reference from initial sysfs_get_dentry().
-			 */
-			dput(victim);
 			res = 0;
 		} else
 			d_drop(victim);
 		
 		/**
-		 * Drop the reference acquired from sysfs_get_dentry() above.
+		 * Drop the reference acquired from lookup_one_len() above.
 		 */
 		dput(victim);
 	}