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

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commit d34cb80840 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: 9d62ed9651 ("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>
This commit is contained in:
Dan Williams 2017-09-25 11:01:31 -07:00 committed by Greg Kroah-Hartman
parent bf93b23582
commit 0f8fb6d5c2
3 changed files with 9 additions and 0 deletions
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1
drivers/nvdimm/dimm.c
View file

@ -68,6 +68,7 @@ static int nvdimm_probe(struct device *dev)
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)

7
drivers/nvdimm/dimm_devs.c
View file

@ -200,6 +200,13 @@ void nvdimm_set_locked(struct device *dev)
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);

1
drivers/nvdimm/nd.h
View file

@ -254,6 +254,7 @@ long nvdimm_clear_poison(struct device *dev, phys_addr_t phys,
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 {