This is a note to let you know that I've just added the patch titled libnvdimm, btt: fix btt_rw_page not returning errors to the 4.12-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: libnvdimm-btt-fix-btt_rw_page-not-returning-errors.patch and it can be found in the queue-4.12 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From c13c43d54f2c6a3be1c675766778ac1ad8dfbfcc Mon Sep 17 00:00:00 2001 From: Vishal Verma <vishal.l.verma@xxxxxxxxx> Date: Thu, 29 Jun 2017 16:59:11 -0600 Subject: libnvdimm, btt: fix btt_rw_page not returning errors From: Vishal Verma <vishal.l.verma@xxxxxxxxx> 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. the pmem driver recently fixed this in e10624f pmem: fail io-requests to known bad blocks but same problem in BTT went neglected. Fixes: 5212e11fde4d ("nd_btt: atomic sector updates") Cc: Toshi Kani <toshi.kani@xxxxxxx> Cc: Dan Williams <dan.j.williams@xxxxxxxxx> Cc: Jeff Moyer <jmoyer@xxxxxxxxxx> Signed-off-by: Vishal Verma <vishal.l.verma@xxxxxxxxx> Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/nvdimm/btt.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) --- a/drivers/nvdimm/btt.c +++ b/drivers/nvdimm/btt.c @@ -1248,10 +1248,13 @@ static int btt_rw_page(struct block_devi struct page *page, bool is_write) { struct btt *btt = bdev->bd_disk->private_data; + int rc; - btt_do_bvec(btt, NULL, page, PAGE_SIZE, 0, is_write, sector); - page_endio(page, is_write, 0); - return 0; + rc = btt_do_bvec(btt, NULL, page, PAGE_SIZE, 0, is_write, sector); + if (rc == 0) + page_endio(page, is_write, 0); + + return rc; } Patches currently in stable-queue which might be from vishal.l.verma@xxxxxxxxx are queue-4.12/libnvdimm-btt-fix-btt_rw_page-not-returning-errors.patch queue-4.12/libnvdimm-fix-the-clear-error-check-in-nsio_rw_bytes.patch queue-4.12/libnvdimm-fix-badblock-range-handling-of-ars-range.patch