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

* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6: (46 commits)
  dev_dbg: check dev_dbg() arguments
  drivers/base/attribute_container.c: use mutex instead of binary semaphore
  mod_sysfs_setup() doesn't return errno when kobject_add_dir() failure occurs
  s2ram: add arch irq disable/enable hooks
  define platform wakeup hook, use in pci_enable_wake()
  security: prevent permission checking of file removal via sysfs_remove_group()
  device_schedule_callback() needs a module reference
  s390: cio: Delay uevents for subchannels
  sysfs: bin.c printk fix
  Driver core: use mutex instead of semaphore in DMA pool handler
  driver core: bus_add_driver should return an error if no bus
  debugfs: Add debugfs_create_u64()
  the overdue removal of the mount/umount uevents
  kobject: Comment and warning fixes to kobject.c
  Driver core: warn when userspace writes to the uevent file in a non-supported way
  Driver core: make uevent-environment available in uevent-file
  kobject core: remove rwsem from struct subsystem
  qeth: Remove usage of subsys.rwsem
  PHY: remove rwsem use from phy core
  IEEE1394: remove rwsem use from ieee1394 core
  ...

1 files changed, 11 insertions, 3 deletions

diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index fc4633378dc0..db0413a411d6 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -633,6 +633,7 @@ struct sysfs_schedule_callback_struct {
         struct kobject          *kobj;
         void                    (*func)(void *);
         void                    *data;
+        struct module           *owner;
         struct work_struct      work;
 };
 
@@ -643,6 +644,7 @@ static void sysfs_schedule_callback_work(struct work_struct *work)
 
         (ss->func)(ss->data);
         kobject_put(ss->kobj);
+        module_put(ss->owner);
         kfree(ss);
 }
 
@@ -651,6 +653,7 @@ static void sysfs_schedule_callback_work(struct work_struct *work)
  * @kobj: object we're acting for.
  * @func: callback function to invoke later.
  * @data: argument to pass to @func.
+ * @owner: module owning the callback code
  *
  * sysfs attribute methods must not unregister themselves or their parent
  * kobject (which would amount to the same thing).  Attempts to do so will
@@ -663,20 +666,25 @@ static void sysfs_schedule_callback_work(struct work_struct *work)
  * until @func returns.
  *
  * Returns 0 if the request was submitted, -ENOMEM if storage could not
- * be allocated.
+ * be allocated, -ENODEV if a reference to @owner isn't available.
  */
 int sysfs_schedule_callback(struct kobject *kobj, void (*func)(void *),
-                void *data)
+                void *data, struct module *owner)
 {
         struct sysfs_schedule_callback_struct *ss;
 
+        if (!try_module_get(owner))
+                return -ENODEV;
         ss = kmalloc(sizeof(*ss), GFP_KERNEL);
-        if (!ss)
+        if (!ss) {
+                module_put(owner);
                 return -ENOMEM;
+        }
         kobject_get(kobj);
         ss->kobj = kobj;
         ss->func = func;
         ss->data = data;
+        ss->owner = owner;
         INIT_WORK(&ss->work, sysfs_schedule_callback_work);
         schedule_work(&ss->work);
         return 0;