UBI: prepare attach and detach functions
Prepare the attach and detach functions to by used outside of
module initialization:
* detach function checks reference count before detaching
* it kills the background thread as well
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index bfc64c8..1142aab 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -1356,7 +1356,7 @@
* ubi_thread - UBI background thread.
* @u: the UBI device description object pointer
*/
-static int ubi_thread(void *u)
+int ubi_thread(void *u)
{
int failures = 0;
struct ubi_device *ubi = u;
@@ -1454,18 +1454,10 @@
sprintf(ubi->bgt_name, UBI_BGT_NAME_PATTERN, ubi->ubi_num);
- ubi->bgt_thread = kthread_create(ubi_thread, ubi, ubi->bgt_name);
- if (IS_ERR(ubi->bgt_thread)) {
- err = PTR_ERR(ubi->bgt_thread);
- ubi_err("cannot spawn \"%s\", error %d", ubi->bgt_name,
- err);
- return err;
- }
-
err = -ENOMEM;
ubi->lookuptbl = kzalloc(ubi->peb_count * sizeof(void *), GFP_KERNEL);
if (!ubi->lookuptbl)
- goto out_free;
+ return err;
list_for_each_entry_safe(seb, tmp, &si->erase, u.list) {
cond_resched();
@@ -1598,10 +1590,6 @@
*/
void ubi_wl_close(struct ubi_device *ubi)
{
- dbg_wl("disable \"%s\"", ubi->bgt_name);
- if (ubi->bgt_thread)
- kthread_stop(ubi->bgt_thread);
-
dbg_wl("close the UBI wear-leveling unit");
cancel_pending(ubi);