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| author | Dan Williams <dan.j.williams@intel.com> | 2021-07-30 09:46:04 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2021-08-11 11:54:43 -0700 |
| commit | d9cee9f85b22fab88d2b76d2e92b18e3d0e6aa8c (patch) | |
| tree | 4bda6335e754bdc28f93cf90c17b4ab2584ac1e8 | |
| parent | b93dfa6bda4d4e88e5386490f2b277a26958f9d3 (diff) | |
| download | linux-d9cee9f85b22fab88d2b76d2e92b18e3d0e6aa8c.tar.bz2 | |
libnvdimm/region: Fix label activation vs errors
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: bf9bccc14c05 ("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>
| -rw-r--r-- | drivers/nvdimm/namespace_devs.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index 2403b71b601e..745478213ff2 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -2527,7 +2527,7 @@ 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]; @@ -2546,13 +2546,14 @@ static int init_active_labels(struct nd_region *nd_region) else if (test_bit(NDD_LABELING, &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); @@ -2586,13 +2587,17 @@ 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) |