[PATCH 4.4 40/69] dm mirror: fix read error on recovery after default leg failure

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Heinz Mauelshagen commit dcb2ff56417362c31f6b430c3c531a84581e8721 upstream. If a default leg has failed, any read will cause a new operational default leg to be selected and

[PATCH 4.4 40/69] dm mirror: fix read error on recovery after default leg failure

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Heinz Mauelshagen commit dcb2ff56417362c31f6b430c3c531a84581e8721 upstream. If a default leg has failed, any read will cause a new operational default leg to be selected and the read is