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-rw-r--r--drivers/md/dm-ioctl.c6
-rw-r--r--drivers/md/dm-table.c2
-rw-r--r--drivers/md/dm.c2
3 files changed, 6 insertions, 4 deletions
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index 5667cea..42cca36 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -1264,9 +1264,12 @@ static int table_load(struct dm_ioctl *param, size_t param_size)
if (r)
goto out;
+ /* Protect md->type and md->queue against concurrent table loads. */
+ dm_lock_md_type(md);
r = populate_table(t, param, param_size);
if (r) {
dm_table_destroy(t);
+ dm_unlock_md_type(md);
goto out;
}
@@ -1276,12 +1279,11 @@ static int table_load(struct dm_ioctl *param, size_t param_size)
DMWARN("can't replace immutable target type %s",
immutable_target_type->name);
dm_table_destroy(t);
+ dm_unlock_md_type(md);
r = -EINVAL;
goto out;
}
- /* Protect md->type and md->queue against concurrent table loads. */
- dm_lock_md_type(md);
if (dm_get_md_type(md) == DM_TYPE_NONE)
/* Initial table load: acquire type of table. */
dm_set_md_type(md, dm_table_get_type(t));
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index f309477..8f87835 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -888,9 +888,7 @@ static int dm_table_set_type(struct dm_table *t)
* Determine the type from the live device.
* Default to bio-based if device is new.
*/
- dm_lock_md_type(t->md);
live_md_type = dm_get_md_type(t->md);
- dm_unlock_md_type(t->md);
if (live_md_type == DM_TYPE_REQUEST_BASED)
request_based = 1;
else
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index ef095a9..7faeaa3 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -2235,11 +2235,13 @@ void dm_unlock_md_type(struct mapped_device *md)
void dm_set_md_type(struct mapped_device *md, unsigned type)
{
+ BUG_ON(!mutex_is_locked(&md->type_lock));
md->type = type;
}
unsigned dm_get_md_type(struct mapped_device *md)
{
+ BUG_ON(!mutex_is_locked(&md->type_lock));
return md->type;
}