[PATCH 4.12 081/196] libnvdimm, btt: fix btt_rw_page not returning errors

4.12-stable review patch. If anyone has any objections, please let me know. -- From: Vishal Verma commit c13c43d54f2c6a3be1c675766778ac1ad8dfbfcc upstream. btt_rw_page was not propagating errors frm btt_do_bvec, resulting in any IO errors via the

[PATCH 4.12 081/196] libnvdimm, btt: fix btt_rw_page not returning errors

4.12-stable review patch. If anyone has any objections, please let me know. -- From: Vishal Verma commit c13c43d54f2c6a3be1c675766778ac1ad8dfbfcc upstream. btt_rw_page was not propagating errors frm btt_do_bvec, resulting in any IO errors via the rw_page path going unnoticed.