[PATCH 4.8 067/138] dm: free io_barrier after blk_cleanup_queue call

4.8-stable review patch. If anyone has any objections, please let me know. -- From: Tahsin Erdogan commit d09960b0032174eb493c4c13be5b9c9ef36dc9a7 upstream. dm_old_request_fn() has paths that access md->io_barrier. The party destroying io_barrier should

[PATCH 4.8 067/138] dm: free io_barrier after blk_cleanup_queue call

4.8-stable review patch. If anyone has any objections, please let me know. -- From: Tahsin Erdogan commit d09960b0032174eb493c4c13be5b9c9ef36dc9a7 upstream. dm_old_request_fn() has paths that access md->io_barrier. The party destroying io_barrier should ensure that no future