* [PATCH v2] libnvdimm: Fix nvdimm_probe error on NVDIMM-N
@ 2016-08-16 19:08 ` Toshi Kani
0 siblings, 0 replies; 4+ messages in thread
From: Toshi Kani @ 2016-08-16 19:08 UTC (permalink / raw)
To: dan.j.williams; +Cc: linux-kernel, linux-nvdimm
'ndctl list --buses --dimms' does not list any NVDIMM-Ns since
they are considered as idle. ndctl checks if any driver is
attached to nmem device. nvdimm_probe() always fails in
nvdimm_init_nsarea() since NVDIMM-Ns do not implement optinal
ND_CMD_GET_CONFIG_DATA command.
Change nvdimm_probe() to accept the case that the CONFIG_DATA
command is not implemented for NVDIMM-Ns. The driver attaches
without ndd, which keeps it no-op to the device.
Reported-by: Brian Boylston <brian.boylston@hpe.com>
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Cc: Dan Williams <dan.j.williams@intel.com>
---
v2:
- Fix failures in ndctl unit test suite. (Dan Williams)
- Change ENOENT to ENOTTY, and remove gotos. (Dan Williams)
---
drivers/nvdimm/dimm.c | 11 +++++++++++
drivers/nvdimm/dimm_devs.c | 28 +++++++++++++++-------------
drivers/nvdimm/nd.h | 1 +
3 files changed, 27 insertions(+), 13 deletions(-)
diff --git a/drivers/nvdimm/dimm.c b/drivers/nvdimm/dimm.c
index 71d12bb..619834e 100644
--- a/drivers/nvdimm/dimm.c
+++ b/drivers/nvdimm/dimm.c
@@ -26,6 +26,14 @@ static int nvdimm_probe(struct device *dev)
struct nvdimm_drvdata *ndd;
int rc;
+ rc = nvdimm_check_config_data(dev);
+ if (rc) {
+ /* not required for non-aliased nvdimm, ex. NVDIMM-N */
+ if (rc == -ENOTTY)
+ rc = 0;
+ return rc;
+ }
+
ndd = kzalloc(sizeof(*ndd), GFP_KERNEL);
if (!ndd)
return -ENOMEM;
@@ -72,6 +80,9 @@ static int nvdimm_remove(struct device *dev)
{
struct nvdimm_drvdata *ndd = dev_get_drvdata(dev);
+ if (!ndd)
+ return 0;
+
nvdimm_bus_lock(dev);
dev_set_drvdata(dev, NULL);
nvdimm_bus_unlock(dev);
diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c
index d9bba5e..c22244a 100644
--- a/drivers/nvdimm/dimm_devs.c
+++ b/drivers/nvdimm/dimm_devs.c
@@ -28,28 +28,30 @@ static DEFINE_IDA(dimm_ida);
* Retrieve bus and dimm handle and return if this bus supports
* get_config_data commands
*/
-static int __validate_dimm(struct nvdimm_drvdata *ndd)
+int nvdimm_check_config_data(struct device *dev)
{
- struct nvdimm *nvdimm;
-
- if (!ndd)
- return -EINVAL;
-
- nvdimm = to_nvdimm(ndd->dev);
+ struct nvdimm *nvdimm = to_nvdimm(dev);
- if (!nvdimm->cmd_mask)
- return -ENXIO;
- if (!test_bit(ND_CMD_GET_CONFIG_DATA, &nvdimm->cmd_mask))
- return -ENXIO;
+ if (!nvdimm->cmd_mask ||
+ !test_bit(ND_CMD_GET_CONFIG_DATA, &nvdimm->cmd_mask)) {
+ if (nvdimm->flags & NDD_ALIASING)
+ return -ENXIO;
+ else
+ return -ENOTTY;
+ }
return 0;
}
static int validate_dimm(struct nvdimm_drvdata *ndd)
{
- int rc = __validate_dimm(ndd);
+ int rc;
+
+ if (!ndd)
+ return -EINVAL;
- if (rc && ndd)
+ rc = nvdimm_check_config_data(ndd->dev);
+ if (rc)
dev_dbg(ndd->dev, "%pf: %s error: %d\n",
__builtin_return_address(0), __func__, rc);
return rc;
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
index 8024a0e..38d6f03 100644
--- a/drivers/nvdimm/nd.h
+++ b/drivers/nvdimm/nd.h
@@ -191,6 +191,7 @@ void nvdimm_exit(void);
void nd_region_exit(void);
struct nvdimm;
struct nvdimm_drvdata *to_ndd(struct nd_mapping *nd_mapping);
+int nvdimm_check_config_data(struct device *dev);
int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd);
int nvdimm_init_config_data(struct nvdimm_drvdata *ndd);
int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset,
_______________________________________________
Linux-nvdimm mailing list
Linux-nvdimm@lists.01.org
https://lists.01.org/mailman/listinfo/linux-nvdimm
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH v2] libnvdimm: Fix nvdimm_probe error on NVDIMM-N
@ 2016-08-16 19:08 ` Toshi Kani
0 siblings, 0 replies; 4+ messages in thread
From: Toshi Kani @ 2016-08-16 19:08 UTC (permalink / raw)
To: dan.j.williams; +Cc: brian.boylston, linux-nvdimm, linux-kernel, Toshi Kani
'ndctl list --buses --dimms' does not list any NVDIMM-Ns since
they are considered as idle. ndctl checks if any driver is
attached to nmem device. nvdimm_probe() always fails in
nvdimm_init_nsarea() since NVDIMM-Ns do not implement optinal
ND_CMD_GET_CONFIG_DATA command.
Change nvdimm_probe() to accept the case that the CONFIG_DATA
command is not implemented for NVDIMM-Ns. The driver attaches
without ndd, which keeps it no-op to the device.
Reported-by: Brian Boylston <brian.boylston@hpe.com>
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Cc: Dan Williams <dan.j.williams@intel.com>
---
v2:
- Fix failures in ndctl unit test suite. (Dan Williams)
- Change ENOENT to ENOTTY, and remove gotos. (Dan Williams)
---
drivers/nvdimm/dimm.c | 11 +++++++++++
drivers/nvdimm/dimm_devs.c | 28 +++++++++++++++-------------
drivers/nvdimm/nd.h | 1 +
3 files changed, 27 insertions(+), 13 deletions(-)
diff --git a/drivers/nvdimm/dimm.c b/drivers/nvdimm/dimm.c
index 71d12bb..619834e 100644
--- a/drivers/nvdimm/dimm.c
+++ b/drivers/nvdimm/dimm.c
@@ -26,6 +26,14 @@ static int nvdimm_probe(struct device *dev)
struct nvdimm_drvdata *ndd;
int rc;
+ rc = nvdimm_check_config_data(dev);
+ if (rc) {
+ /* not required for non-aliased nvdimm, ex. NVDIMM-N */
+ if (rc == -ENOTTY)
+ rc = 0;
+ return rc;
+ }
+
ndd = kzalloc(sizeof(*ndd), GFP_KERNEL);
if (!ndd)
return -ENOMEM;
@@ -72,6 +80,9 @@ static int nvdimm_remove(struct device *dev)
{
struct nvdimm_drvdata *ndd = dev_get_drvdata(dev);
+ if (!ndd)
+ return 0;
+
nvdimm_bus_lock(dev);
dev_set_drvdata(dev, NULL);
nvdimm_bus_unlock(dev);
diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c
index d9bba5e..c22244a 100644
--- a/drivers/nvdimm/dimm_devs.c
+++ b/drivers/nvdimm/dimm_devs.c
@@ -28,28 +28,30 @@ static DEFINE_IDA(dimm_ida);
* Retrieve bus and dimm handle and return if this bus supports
* get_config_data commands
*/
-static int __validate_dimm(struct nvdimm_drvdata *ndd)
+int nvdimm_check_config_data(struct device *dev)
{
- struct nvdimm *nvdimm;
-
- if (!ndd)
- return -EINVAL;
-
- nvdimm = to_nvdimm(ndd->dev);
+ struct nvdimm *nvdimm = to_nvdimm(dev);
- if (!nvdimm->cmd_mask)
- return -ENXIO;
- if (!test_bit(ND_CMD_GET_CONFIG_DATA, &nvdimm->cmd_mask))
- return -ENXIO;
+ if (!nvdimm->cmd_mask ||
+ !test_bit(ND_CMD_GET_CONFIG_DATA, &nvdimm->cmd_mask)) {
+ if (nvdimm->flags & NDD_ALIASING)
+ return -ENXIO;
+ else
+ return -ENOTTY;
+ }
return 0;
}
static int validate_dimm(struct nvdimm_drvdata *ndd)
{
- int rc = __validate_dimm(ndd);
+ int rc;
+
+ if (!ndd)
+ return -EINVAL;
- if (rc && ndd)
+ rc = nvdimm_check_config_data(ndd->dev);
+ if (rc)
dev_dbg(ndd->dev, "%pf: %s error: %d\n",
__builtin_return_address(0), __func__, rc);
return rc;
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
index 8024a0e..38d6f03 100644
--- a/drivers/nvdimm/nd.h
+++ b/drivers/nvdimm/nd.h
@@ -191,6 +191,7 @@ void nvdimm_exit(void);
void nd_region_exit(void);
struct nvdimm;
struct nvdimm_drvdata *to_ndd(struct nd_mapping *nd_mapping);
+int nvdimm_check_config_data(struct device *dev);
int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd);
int nvdimm_init_config_data(struct nvdimm_drvdata *ndd);
int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset,
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH v2] libnvdimm: Fix nvdimm_probe error on NVDIMM-N
2016-08-16 19:08 ` Toshi Kani
@ 2016-08-19 8:17 ` Johannes Thumshirn
-1 siblings, 0 replies; 4+ messages in thread
From: Johannes Thumshirn @ 2016-08-19 8:17 UTC (permalink / raw)
To: Toshi Kani; +Cc: linux-kernel, linux-nvdimm
On Tue, Aug 16, 2016 at 01:08:40PM -0600, Toshi Kani wrote:
> 'ndctl list --buses --dimms' does not list any NVDIMM-Ns since
> they are considered as idle. ndctl checks if any driver is
> attached to nmem device. nvdimm_probe() always fails in
> nvdimm_init_nsarea() since NVDIMM-Ns do not implement optinal
> ND_CMD_GET_CONFIG_DATA command.
>
> Change nvdimm_probe() to accept the case that the CONFIG_DATA
> command is not implemented for NVDIMM-Ns. The driver attaches
> without ndd, which keeps it no-op to the device.
>
> Reported-by: Brian Boylston <brian.boylston@hpe.com>
> Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
> Cc: Dan Williams <dan.j.williams@intel.com>
Tested-by: Johannes Thumshirn <jthumshirn@suse.de>
Acked-by: Johannes Thumshirn <jthumshirn@suse.de>
--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
_______________________________________________
Linux-nvdimm mailing list
Linux-nvdimm@lists.01.org
https://lists.01.org/mailman/listinfo/linux-nvdimm
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v2] libnvdimm: Fix nvdimm_probe error on NVDIMM-N
@ 2016-08-19 8:17 ` Johannes Thumshirn
0 siblings, 0 replies; 4+ messages in thread
From: Johannes Thumshirn @ 2016-08-19 8:17 UTC (permalink / raw)
To: Toshi Kani; +Cc: dan.j.williams, linux-kernel, linux-nvdimm
On Tue, Aug 16, 2016 at 01:08:40PM -0600, Toshi Kani wrote:
> 'ndctl list --buses --dimms' does not list any NVDIMM-Ns since
> they are considered as idle. ndctl checks if any driver is
> attached to nmem device. nvdimm_probe() always fails in
> nvdimm_init_nsarea() since NVDIMM-Ns do not implement optinal
> ND_CMD_GET_CONFIG_DATA command.
>
> Change nvdimm_probe() to accept the case that the CONFIG_DATA
> command is not implemented for NVDIMM-Ns. The driver attaches
> without ndd, which keeps it no-op to the device.
>
> Reported-by: Brian Boylston <brian.boylston@hpe.com>
> Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
> Cc: Dan Williams <dan.j.williams@intel.com>
Tested-by: Johannes Thumshirn <jthumshirn@suse.de>
Acked-by: Johannes Thumshirn <jthumshirn@suse.de>
--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2016-08-19 8:17 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-08-16 19:08 [PATCH v2] libnvdimm: Fix nvdimm_probe error on NVDIMM-N Toshi Kani
2016-08-16 19:08 ` Toshi Kani
2016-08-19 8:17 ` Johannes Thumshirn
2016-08-19 8:17 ` Johannes Thumshirn
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.