From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: dan.j.williams@intel.com
Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
linux-nvdimm@lists.01.org
Subject: [PATCH v3 1/6] nvdimm: Consider probe return -EOPNOTSUPP as success
Date: Tue, 4 Jun 2019 14:43:52 +0530 [thread overview]
Message-ID: <20190604091357.32213-1-aneesh.kumar@linux.ibm.com> (raw)
With following patches we add EOPNOTSUPP as return from probe callback to
indicate we were not able to initialize a namespace due to pfn superblock
feature/version mismatch. We want to consider this a probe success so that
we can create new namesapce seed and there by avoid marking the failed
namespace as the seed namespace.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
drivers/nvdimm/bus.c | 4 ++--
drivers/nvdimm/nd-core.h | 3 ++-
drivers/nvdimm/region_devs.c | 19 +++++++++++++++----
3 files changed, 19 insertions(+), 7 deletions(-)
diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index 2eb6a6cfe9e4..792b3e90453b 100644
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -100,8 +100,8 @@ static int nvdimm_bus_probe(struct device *dev)
nvdimm_bus_probe_start(nvdimm_bus);
rc = nd_drv->probe(dev);
- if (rc == 0)
- nd_region_probe_success(nvdimm_bus, dev);
+ if (rc == 0 || rc == -EOPNOTSUPP)
+ nd_region_probe_success(nvdimm_bus, dev, rc);
else
nd_region_disable(nvdimm_bus, dev);
nvdimm_bus_probe_end(nvdimm_bus);
diff --git a/drivers/nvdimm/nd-core.h b/drivers/nvdimm/nd-core.h
index e5ffd5733540..9e67a79fb6d5 100644
--- a/drivers/nvdimm/nd-core.h
+++ b/drivers/nvdimm/nd-core.h
@@ -134,7 +134,8 @@ int __init nvdimm_bus_init(void);
void nvdimm_bus_exit(void);
void nvdimm_devs_exit(void);
void nd_region_devs_exit(void);
-void nd_region_probe_success(struct nvdimm_bus *nvdimm_bus, struct device *dev);
+void nd_region_probe_success(struct nvdimm_bus *nvdimm_bus,
+ struct device *dev, int ret);
struct nd_region;
void nd_region_create_ns_seed(struct nd_region *nd_region);
void nd_region_create_btt_seed(struct nd_region *nd_region);
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c
index b4ef7d9ff22e..fcf3d8828540 100644
--- a/drivers/nvdimm/region_devs.c
+++ b/drivers/nvdimm/region_devs.c
@@ -723,7 +723,7 @@ void nd_mapping_free_labels(struct nd_mapping *nd_mapping)
* disable the region.
*/
static void nd_region_notify_driver_action(struct nvdimm_bus *nvdimm_bus,
- struct device *dev, bool probe)
+ struct device *dev, bool probe, int ret)
{
struct nd_region *nd_region;
@@ -753,6 +753,16 @@ static void nd_region_notify_driver_action(struct nvdimm_bus *nvdimm_bus,
nd_region_create_ns_seed(nd_region);
nvdimm_bus_unlock(dev);
}
+
+ if (dev->parent && is_nd_region(dev->parent) &&
+ !probe && (ret == -EOPNOTSUPP)) {
+ nd_region = to_nd_region(dev->parent);
+ nvdimm_bus_lock(dev);
+ if (nd_region->ns_seed == dev)
+ nd_region_create_ns_seed(nd_region);
+ nvdimm_bus_unlock(dev);
+ }
+
if (is_nd_btt(dev) && probe) {
struct nd_btt *nd_btt = to_nd_btt(dev);
@@ -788,14 +798,15 @@ static void nd_region_notify_driver_action(struct nvdimm_bus *nvdimm_bus,
}
}
-void nd_region_probe_success(struct nvdimm_bus *nvdimm_bus, struct device *dev)
+void nd_region_probe_success(struct nvdimm_bus *nvdimm_bus,
+ struct device *dev, int ret)
{
- nd_region_notify_driver_action(nvdimm_bus, dev, true);
+ nd_region_notify_driver_action(nvdimm_bus, dev, true, ret);
}
void nd_region_disable(struct nvdimm_bus *nvdimm_bus, struct device *dev)
{
- nd_region_notify_driver_action(nvdimm_bus, dev, false);
+ nd_region_notify_driver_action(nvdimm_bus, dev, false, 0);
}
static ssize_t mappingN(struct device *dev, char *buf, int n)
--
2.21.0
next reply other threads:[~2019-06-04 9:15 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-04 9:13 Aneesh Kumar K.V [this message]
2019-06-04 9:13 ` [PATCH v3 2/6] mm/nvdimm: Add PFN_MIN_VERSION support Aneesh Kumar K.V
2019-06-04 9:13 ` [PATCH v3 3/6] mm/nvdimm: Add page size and struct page size to pfn superblock Aneesh Kumar K.V
2019-06-11 10:37 ` Jan Kara
2019-06-04 9:13 ` [PATCH v3 4/6] mm/nvdimm: Use correct #defines instead of opencoding Aneesh Kumar K.V
2019-06-04 9:13 ` [PATCH v3 5/6] mm/nvdimm: Pick the right alignment default when creating dax devices Aneesh Kumar K.V
2019-06-04 9:13 ` [PATCH v3 6/6] mm/nvdimm: Use correct alignment when looking at first pfn from a region Aneesh Kumar K.V
2019-06-11 9:29 ` [PATCH v3 1/6] nvdimm: Consider probe return -EOPNOTSUPP as success Aneesh Kumar K.V
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