Patch "libnvdimm: fix clear length of nvdimm_forget_poison()" has been added to the 4.9-stable tree

Patch "libnvdimm: fix clear length of nvdimm_forget_poison()" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    libnvdimm: fix clear length of nvdimm_forget_poison()

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-fix-clear-length-of-nvdimm_forget_poison.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@vger.kernel.org> know about it.


>From 8d13c0290655b883df9083a2a0af0d782bc38aef Mon Sep 17 00:00:00 2001
From: Toshi Kani <toshi.kani@hpe.com>
Date: Thu, 27 Apr 2017 16:57:05 -0600
Subject: libnvdimm: fix clear length of nvdimm_forget_poison()

From: Toshi Kani <toshi.kani@hpe.com>

commit 8d13c0290655b883df9083a2a0af0d782bc38aef upstream.

ND_CMD_CLEAR_ERROR command returns 'clear_err.cleared', the length
of error actually cleared, which may be smaller than its requested
'len'.

Change nvdimm_clear_poison() to call nvdimm_forget_poison() with
'clear_err.cleared' when this value is valid.

Fixes: e046114af5fc ("libnvdimm: clear the internal poison_list when clearing badblocks")
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/nvdimm/bus.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -218,7 +218,10 @@ long nvdimm_clear_poison(struct device *
 	if (cmd_rc < 0)
 		return cmd_rc;
 
-	nvdimm_clear_from_poison_list(nvdimm_bus, phys, len);
+	if (clear_err.cleared > 0)
+		nvdimm_clear_from_poison_list(nvdimm_bus, phys,
+					      clear_err.cleared);
+
 	return clear_err.cleared;
 }
 EXPORT_SYMBOL_GPL(nvdimm_clear_poison);


Patches currently in stable-queue which might be from toshi.kani@hpe.com are

queue-4.9/libnvdimm-fix-clear-length-of-nvdimm_forget_poison.patch