diff options
| author | Badari Pulavarty <pbadari@us.ibm.com> | 2008-02-11 09:23:18 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-04-19 19:10:19 -0700 |
| commit | 00a41db522c77af33ea5ee9837d4f043ce150249 (patch) | |
| tree | 97e145d00adadcaf00f7d0997b7089c8a7d53894 /drivers | |
| parent | da19cbcf71cde3c09587b5924d113f0c7f1fd23a (diff) | |
driver core: register_memory/unregister_memory clean ups and bugfix
register_memory()/unregister_memory() never gets called with
"root". unregister_memory() is accessing kobject_name of
the object just freed up. Since no one uses the code,
lets take the code out. And also, make register_memory() static.
Another bug fix - before calling unregister_memory()
remove_memory_block() gets a ref on kobject. unregister_memory()
need to drop that ref before calling sysdev_unregister().
Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/base/memory.c | 22 |
1 files changed, 7 insertions, 15 deletions
diff --git a/drivers/base/memory.c b/drivers/base/memory.c index 1f3801a8184d..7891f7c97267 100644 --- a/drivers/base/memory.c +++ b/drivers/base/memory.c @@ -62,8 +62,8 @@ void unregister_memory_notifier(struct notifier_block *nb) /* * register_memory - Setup a sysfs device for a memory block */ -int register_memory(struct memory_block *memory, struct mem_section *section, - struct node *root) +static +int register_memory(struct memory_block *memory, struct mem_section *section) { int error; @@ -71,26 +71,18 @@ int register_memory(struct memory_block *memory, struct mem_section *section, memory->sysdev.id = __section_nr(section); error = sysdev_register(&memory->sysdev); - - if (root && !error) - error = sysfs_create_link(&root->sysdev.kobj, - &memory->sysdev.kobj, - kobject_name(&memory->sysdev.kobj)); - return error; } static void -unregister_memory(struct memory_block *memory, struct mem_section *section, - struct node *root) +unregister_memory(struct memory_block *memory, struct mem_section *section) { BUG_ON(memory->sysdev.cls != &memory_sysdev_class); BUG_ON(memory->sysdev.id != __section_nr(section)); + /* drop the ref. we got in remove_memory_block() */ + kobject_put(&memory->sysdev.kobj); sysdev_unregister(&memory->sysdev); - if (root) - sysfs_remove_link(&root->sysdev.kobj, - kobject_name(&memory->sysdev.kobj)); } /* @@ -345,7 +337,7 @@ static int add_memory_block(unsigned long node_id, struct mem_section *section, mutex_init(&mem->state_mutex); mem->phys_device = phys_device; - ret = register_memory(mem, section, NULL); + ret = register_memory(mem, section); if (!ret) ret = mem_create_simple_file(mem, phys_index); if (!ret) @@ -396,7 +388,7 @@ int remove_memory_block(unsigned long node_id, struct mem_section *section, mem_remove_simple_file(mem, phys_index); mem_remove_simple_file(mem, state); mem_remove_simple_file(mem, phys_device); - unregister_memory(mem, section, NULL); + unregister_memory(mem, section); return 0; } |