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UBI: prepare attach and detach functions

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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>
This commit is contained in:
Artem Bityutskiy
2007-12-17 20:33:20 +02:00
parent e73f4459d9
commit cdfa788acd
3 changed files with 169 additions and 87 deletions
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16
drivers/mtd/ubi/wl.c
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@ -1356,7 +1356,7 @@ static void tree_destroy(struct rb_root *root)
* 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 @@ int ubi_wl_init_scan(struct ubi_device *ubi, struct ubi_scan_info *si)
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 @@ static void protection_trees_destroy(struct ubi_device *ubi)
*/
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);