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| author | Toshi Kani <toshi.kani@hpe.com> | 2016-08-16 13:08:40 -0600 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2016-09-01 18:20:39 -0700 |
| commit | aee6598748335794dc25d7c4f16f0d4801f6b584 (patch) | |
| tree | 0fcbceaa2e2776249cb9bf36a64bb8e51cf0ed11 /drivers/nvdimm | |
| parent | ae551e9ca289762c63a6a139872a63dd66183209 (diff) | |
| download | linux-aee6598748335794dc25d7c4f16f0d4801f6b584.tar.gz linux-aee6598748335794dc25d7c4f16f0d4801f6b584.tar.bz2 linux-aee6598748335794dc25d7c4f16f0d4801f6b584.zip | |
libnvdimm: Fix nvdimm_probe error on NVDIMM-N
'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>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm')
| -rw-r--r-- | drivers/nvdimm/dimm.c | 11 | ||||
| -rw-r--r-- | drivers/nvdimm/dimm_devs.c | 28 | ||||
| -rw-r--r-- | 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 71d12bb67339..619834e144d1 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 ce75cc3f41fb..cf36470e94c0 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 8024a0ef86d3..38d6f039234e 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, |