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 4.9-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-4.9 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
@@ -1203,10 +1203,13 @@ 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-4.9/libnvdimm-btt-fix-btt_rw_page-not-returning-errors.patch
queue-4.9/libnvdimm-fix-badblock-range-handling-of-ars-range.patch