From 086a377edc969aea6c761176a7e4ff68f264d6fe Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Thu, 7 May 2009 12:36:53 -0700 Subject: sysfs: file.c: use create_singlethread_workqueue() We don't need a kernel thread per CPU for this application. Acked-by: Alex Chiang Cc: Lai Jiangshan Cc: Peter Zijlstra Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- fs/sysfs/file.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index b1606e07b7a..561a9c050ce 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c @@ -723,7 +723,7 @@ int sysfs_schedule_callback(struct kobject *kobj, void (*func)(void *), mutex_unlock(&sysfs_workq_mutex); if (sysfs_workqueue == NULL) { - sysfs_workqueue = create_workqueue("sysfsd"); + sysfs_workqueue = create_singlethread_workqueue("sysfsd"); if (sysfs_workqueue == NULL) { module_put(owner); return -ENOMEM; -- cgit v1.2.3-70-g09d2 From 5c8563d773c0e9f0ac2a552e84806decd98ce732 Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Thu, 28 May 2009 14:24:07 -0700 Subject: Driver Core: do not oops when driver_unregister() is called for unregistered drivers MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit We also fix a problem with cleaning up properly when initializing drivers and devices, so checks like this will work successfully. Portions of the patch by Linus and Greg and Ingo. Reported-by: Ozan Çağlayan Signed-off-by: Kay Sievers Cc: Linus Torvalds Cc: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- drivers/base/bus.c | 4 +++- drivers/base/core.c | 5 ++++- drivers/base/driver.c | 4 ++++ 3 files changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/base/bus.c b/drivers/base/bus.c index dc030f1f00f..c6599618523 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -700,8 +700,10 @@ int bus_add_driver(struct device_driver *drv) } kobject_uevent(&priv->kobj, KOBJ_ADD); - return error; + return 0; out_unregister: + kfree(drv->p); + drv->p = NULL; kobject_put(&priv->kobj); out_put_bus: bus_put(bus); diff --git a/drivers/base/core.c b/drivers/base/core.c index 4aa527b8a91..1977d4beb89 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -879,7 +879,7 @@ int device_add(struct device *dev) } if (!dev_name(dev)) - goto done; + goto name_error; pr_debug("device: '%s': %s\n", dev_name(dev), __func__); @@ -978,6 +978,9 @@ done: cleanup_device_parent(dev); if (parent) put_device(parent); +name_error: + kfree(dev->p); + dev->p = NULL; goto done; } diff --git a/drivers/base/driver.c b/drivers/base/driver.c index c51f11bb29a..8ae0f63602e 100644 --- a/drivers/base/driver.c +++ b/drivers/base/driver.c @@ -257,6 +257,10 @@ EXPORT_SYMBOL_GPL(driver_register); */ void driver_unregister(struct device_driver *drv) { + if (!drv || !drv->p) { + WARN(1, "Unexpected driver unregister!\n"); + return; + } driver_remove_groups(drv, drv->groups); bus_remove_driver(drv); } -- cgit v1.2.3-70-g09d2