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libnvdimm, nfit: centralize command status translation

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The return value from an 'ndctl_fn' reports the command execution
status, i.e. was the command properly formatted and was it successfully
submitted to the bus provider.  The new 'cmd_rc' parameter allows the bus
provider to communicate command specific results, translated into
common error codes.

Convert the ARS commands to this scheme to:

1/ Consolidate status reporting

2/ Prepare for for expanding ars unit test cases

3/ Make the implementation more generic

Cc: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2016-02-12 17:01:11 -08:00
parent 3b87356f50
commit aef2533822
6 changed files with 140 additions and 69 deletions
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2
include/linux/libnvdimm.h
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@ -48,7 +48,7 @@ struct nvdimm;
struct nvdimm_bus_descriptor;
typedef int (*ndctl_fn)(struct nvdimm_bus_descriptor *nd_desc,
struct nvdimm *nvdimm, unsigned int cmd, void *buf,
unsigned int buf_len);
unsigned int buf_len, int *cmd_rc);
struct nd_namespace_label;
struct nvdimm_drvdata;