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libnvdimm/region: Fix label activation vs errors 

commit d9cee9f85b22fab88d2b76d2e92b18e3d0e6aa8c upstream.

There are a few scenarios where init_active_labels() can return without
registering deactivate_labels() to run when the region is disabled. In
particular label error injection creates scenarios where a DIMM is
disabled, but labels on other DIMMs in the region become activated.

Arrange for init_active_labels() to always register deactivate_labels().

Reported-by: Krzysztof Kensicki <krzysztof.kensicki@intel.com>
Cc: <stable@vger.kernel.org>
Fixes: bf9bccc14c ("libnvdimm: pmem label sets and namespace instantiation.")
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Link: https://lore.kernel.org/r/162766356450.3223041.1183118139023841447.stgit@dwillia2-desk3.amr.corp.intel.com
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 2021-07-30 09:46:04 -07:00 committed by Greg Kroah-Hartman
parent bc97fde4c6
commit ddcf807fbb
1 changed files with 11 additions and 6 deletions
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17
drivers/nvdimm/namespace_devs.c
View File

@ -2486,7 +2486,7 @@ static void deactivate_labels(void *region)
static int init_active_labels(struct nd_region *nd_region)
{
int i;
int i, rc = 0;
for (i = 0; i < nd_region->ndr_mappings; i++) {
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
@ -2505,13 +2505,14 @@ static int init_active_labels(struct nd_region *nd_region)
else if (test_bit(NDD_ALIASING, &nvdimm->flags))
/* fail, labels needed to disambiguate dpa */;
else
return 0;
continue;
dev_err(&nd_region->dev, "%s: is %s, failing probe\n",
dev_name(&nd_mapping->nvdimm->dev),
test_bit(NDD_LOCKED, &nvdimm->flags)
? "locked" : "disabled");
return -ENXIO;
rc = -ENXIO;
goto out;
}
nd_mapping->ndd = ndd;
atomic_inc(&nvdimm->busy);
@ -2545,13 +2546,17 @@ static int init_active_labels(struct nd_region *nd_region)
break;
}
if (i < nd_region->ndr_mappings) {
if (i < nd_region->ndr_mappings)
rc = -ENOMEM;
out:
if (rc) {
deactivate_labels(nd_region);
return -ENOMEM;
return rc;
}
return devm_add_action_or_reset(&nd_region->dev, deactivate_labels,
nd_region);
nd_region);
}
int nd_region_register_namespaces(struct nd_region *nd_region, int *err)