diff options
author | Dan Williams <dan.j.williams@intel.com> | 2018-04-09 12:34:24 -0700 |
---|---|---|
committer | Dan Williams <dan.j.williams@intel.com> | 2018-04-16 08:18:51 -0700 |
commit | e7c5a571a8d6a266aee9ca3f3f26e5afe3717eca (patch) | |
tree | b3f9dbb9f9f7cc95d05384f0dd0bcea01130796e | |
parent | 60cc43fc888428bb2f18f08997432d426a243338 (diff) | |
download | linux-e7c5a571a8d6a266aee9ca3f3f26e5afe3717eca.tar.bz2 |
libnvdimm, dimm: handle EACCES failures from label reads
The new support for the standard _LSR and _LSW methods neglected to also
update the nvdimm_init_config_data() and nvdimm_set_config_data() to
return the translated error code from failed commands. This precision is
necessary because the locked status that was previously returned on
ND_CMD_GET_CONFIG_SIZE commands is now returned on
ND_CMD_{GET,SET}_CONFIG_DATA commands.
If the kernel misses this indication it can inadvertently fall back to
label-less mode when it should otherwise avoid all access to locked
regions.
Cc: <stable@vger.kernel.org>
Fixes: 4b27db7e26cd ("acpi, nfit: add support for the _LSI, _LSR, and...")
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
-rw-r--r-- | drivers/nvdimm/dimm_devs.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c index e00d45522b80..8d348b22ba45 100644 --- a/drivers/nvdimm/dimm_devs.c +++ b/drivers/nvdimm/dimm_devs.c @@ -88,9 +88,9 @@ int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd) int nvdimm_init_config_data(struct nvdimm_drvdata *ndd) { struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(ndd->dev); + int rc = validate_dimm(ndd), cmd_rc = 0; struct nd_cmd_get_config_data_hdr *cmd; struct nvdimm_bus_descriptor *nd_desc; - int rc = validate_dimm(ndd); u32 max_cmd_size, config_size; size_t offset; @@ -124,9 +124,11 @@ int nvdimm_init_config_data(struct nvdimm_drvdata *ndd) cmd->in_offset = offset; rc = nd_desc->ndctl(nd_desc, to_nvdimm(ndd->dev), ND_CMD_GET_CONFIG_DATA, cmd, - cmd->in_length + sizeof(*cmd), NULL); - if (rc || cmd->status) { - rc = -ENXIO; + cmd->in_length + sizeof(*cmd), &cmd_rc); + if (rc < 0) + break; + if (cmd_rc < 0) { + rc = cmd_rc; break; } memcpy(ndd->data + offset, cmd->out_buf, cmd->in_length); @@ -140,9 +142,9 @@ int nvdimm_init_config_data(struct nvdimm_drvdata *ndd) int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset, void *buf, size_t len) { - int rc = validate_dimm(ndd); size_t max_cmd_size, buf_offset; struct nd_cmd_set_config_hdr *cmd; + int rc = validate_dimm(ndd), cmd_rc = 0; struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(ndd->dev); struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc; @@ -164,7 +166,6 @@ int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset, for (buf_offset = 0; len; len -= cmd->in_length, buf_offset += cmd->in_length) { size_t cmd_size; - u32 *status; cmd->in_offset = offset + buf_offset; cmd->in_length = min(max_cmd_size, len); @@ -172,12 +173,13 @@ int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset, /* status is output in the last 4-bytes of the command buffer */ cmd_size = sizeof(*cmd) + cmd->in_length + sizeof(u32); - status = ((void *) cmd) + cmd_size - sizeof(u32); rc = nd_desc->ndctl(nd_desc, to_nvdimm(ndd->dev), - ND_CMD_SET_CONFIG_DATA, cmd, cmd_size, NULL); - if (rc || *status) { - rc = rc ? rc : -ENXIO; + ND_CMD_SET_CONFIG_DATA, cmd, cmd_size, &cmd_rc); + if (rc < 0) + break; + if (cmd_rc < 0) { + rc = cmd_rc; break; } } |