From: Dan Williams <dan.j.williams@intel.com>
To: nvdimm@lists.linux.dev
Cc: Krzysztof Kensicki <krzysztof.kensicki@intel.com>,
vishal.l.verma@intel.com
Subject: [PATCH] libnvdimm/region: Fix label activation vs errors
Date: Fri, 30 Jul 2021 09:46:04 -0700 [thread overview]
Message-ID: <162766356450.3223041.1183118139023841447.stgit@dwillia2-desk3.amr.corp.intel.com> (raw)
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>
Fixes: bf9bccc14c05 ("libnvdimm: pmem label sets and namespace instantiation.")
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
drivers/nvdimm/namespace_devs.c | 17 +++++++++++------
1 file 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)
next reply other threads:[~2021-07-30 16:46 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-30 16:46 Dan Williams [this message]
2021-08-04 17:12 ` [PATCH] libnvdimm/region: Fix label activation vs errors Jeff Moyer
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