@@ -1595,7 +1595,6 @@
if (!md)
return -ENXIO;
- dm_get(md);
mutex_lock(&_name_read_lock);
hc = dm_get_mdptr(md);
if (!hc || hc->md != md) {
@@ -1610,7 +1609,6 @@
out:
mutex_unlock(&_name_read_lock);
- dm_put(md);
return r;
}
@@ -1998,28 +1998,24 @@
if (MAJOR(dev) != _major || minor >= (1 << MINORBITS))
return NULL;
- spin_lock(&_minor_lock);
-
md = idr_find(&_minor_idr, minor);
if (md && (md == MINOR_ALLOCED ||
(MINOR(disk_devt(dm_disk(md))) != minor) ||
- test_bit(DMF_FREEING, &md->flags))) {
- md = NULL;
- goto out;
- }
-
-out:
- spin_unlock(&_minor_lock);
+ test_bit(DMF_FREEING, &md->flags)))
+ return NULL;
return md;
}
struct mapped_device *dm_get_md(dev_t dev)
{
- struct mapped_device *md = dm_find_md(dev);
+ struct mapped_device *md;
+ spin_lock(&_minor_lock);
+ md = dm_find_md(dev);
if (md)
dm_get(md);
+ spin_unlock(&_minor_lock);
return md;
}
@@ -2584,11 +2580,17 @@
if (&md->kobj != kobj)
return NULL;
+ spin_lock(&_minor_lock);
+
if (test_bit(DMF_FREEING, &md->flags) ||
test_bit(DMF_DELETING, &md->flags))
- return NULL;
+ md = NULL;
- dm_get(md);
+ if (md)
+ dm_get(md);
+
+ spin_unlock(&_minor_lock);
+
return md;
}