Patch "libnvdimm, dimm: clear 'locked' status on successful DIMM enable" has been added to the 4.14-stable tree

Patch "libnvdimm, dimm: clear 'locked' status on successful DIMM enable" has been added to the 4.14-stable tree

[gregkh]

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

    libnvdimm, dimm: clear 'locked' status on successful DIMM enable

to the 4.14-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-dimm-clear-locked-status-on-successful-dimm-enable.patch
and it can be found in the queue-4.14 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 d34cb808402898e53b9a9bcbbedd01667a78723b Mon Sep 17 00:00:00 2001
From: Dan Williams <dan.j.williams@intel.com>
Date: Mon, 25 Sep 2017 11:01:31 -0700
Subject: libnvdimm, dimm: clear 'locked' status on successful DIMM enable

From: Dan Williams <dan.j.williams@intel.com>

commit d34cb808402898e53b9a9bcbbedd01667a78723b upstream.

If we successfully enable a DIMM then it must not be locked and we can
clear the label-read failure condition. Otherwise, we need to reload the
entire bus provider driver to achieve the same effect, and that can
disrupt unrelated DIMMs and namespaces.

Fixes: 9d62ed965118 ("libnvdimm: handle locked label storage areas")
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/nvdimm/dimm.c      |    1 +
 drivers/nvdimm/dimm_devs.c |    7 +++++++
 drivers/nvdimm/nd.h        |    1 +
 3 files changed, 9 insertions(+)

--- a/drivers/nvdimm/dimm.c
+++ b/drivers/nvdimm/dimm.c
@@ -68,6 +68,7 @@ static int nvdimm_probe(struct device *d
 	rc = nd_label_reserve_dpa(ndd);
 	if (ndd->ns_current >= 0)
 		nvdimm_set_aliasing(dev);
+	nvdimm_clear_locked(dev);
 	nvdimm_bus_unlock(dev);
 
 	if (rc)
--- a/drivers/nvdimm/dimm_devs.c
+++ b/drivers/nvdimm/dimm_devs.c
@@ -200,6 +200,13 @@ void nvdimm_set_locked(struct device *de
 	set_bit(NDD_LOCKED, &nvdimm->flags);
 }
 
+void nvdimm_clear_locked(struct device *dev)
+{
+	struct nvdimm *nvdimm = to_nvdimm(dev);
+
+	clear_bit(NDD_LOCKED, &nvdimm->flags);
+}
+
 static void nvdimm_release(struct device *dev)
 {
 	struct nvdimm *nvdimm = to_nvdimm(dev);
--- a/drivers/nvdimm/nd.h
+++ b/drivers/nvdimm/nd.h
@@ -254,6 +254,7 @@ long nvdimm_clear_poison(struct device *
 		unsigned int len);
 void nvdimm_set_aliasing(struct device *dev);
 void nvdimm_set_locked(struct device *dev);
+void nvdimm_clear_locked(struct device *dev);
 struct nd_btt *to_nd_btt(struct device *dev);
 
 struct nd_gen_sb {


Patches currently in stable-queue which might be from dan.j.williams@intel.com are

queue-4.14/libnvdimm-dimm-clear-locked-status-on-successful-dimm-enable.patch
queue-4.14/libnvdimm-pfn-make-resource-attribute-only-readable-by-root.patch
queue-4.14/libnvdimm-region-make-resource-attribute-only-readable-by-root.patch
queue-4.14/dax-fix-pmd-faults-on-zero-length-files.patch
queue-4.14/libnvdimm-namespace-make-resource-attribute-only-readable-by-root.patch
queue-4.14/dax-fix-general-protection-fault-in-dax_alloc_inode.patch
queue-4.14/libnvdimm-namespace-fix-label-initialization-to-use-valid-seq-numbers.patch