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bcache: Fix a lockdep splat in an error path

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Signed-off-by: Kent Overstreet <kmo@daterainc.com>
This commit is contained in:
Kent Overstreet 2014-03-17 18:58:55 -07:00
parent dabb443340
commit 4fa03402cd
1 changed files with 5 additions and 3 deletions
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8
drivers/md/bcache/super.c
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@ -1873,7 +1873,10 @@ static void register_cache(struct cache_sb *sb, struct page *sb_page,
if (kobject_add(&ca->kobj, &part_to_dev(bdev->bd_part)->kobj, "bcache"))
goto err;
mutex_lock(&bch_register_lock);
err = register_cache_set(ca);
mutex_unlock(&bch_register_lock);
if (err)
goto err;
@ -1935,8 +1938,6 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr,
if (!try_module_get(THIS_MODULE))
return -EBUSY;
mutex_lock(&bch_register_lock);
if (!(path = kstrndup(buffer, size, GFP_KERNEL)) ||
!(sb = kmalloc(sizeof(struct cache_sb), GFP_KERNEL)))
goto err;
@ -1969,7 +1970,9 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr,
if (!dc)
goto err_close;
mutex_lock(&bch_register_lock);
register_bdev(sb, sb_page, bdev, dc);
mutex_unlock(&bch_register_lock);
} else {
struct cache *ca = kzalloc(sizeof(*ca), GFP_KERNEL);
if (!ca)
@ -1982,7 +1985,6 @@ out:
put_page(sb_page);
kfree(sb);
kfree(path);
mutex_unlock(&bch_register_lock);
module_put(THIS_MODULE);
return ret;