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libnvdimm, btt: add btt startup debug 

Report the reason for btt probe failures when debug is enabled.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2016-04-22 12:26:05 -07:00
parent 8259542348
commit 9dec4892ca
1 changed files with 5 additions and 1 deletions
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6
drivers/nvdimm/btt.c
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@ -1388,11 +1388,15 @@ int nvdimm_namespace_attach_btt(struct nd_namespace_common *ndns)
struct btt *btt;
size_t rawsize;
if (!nd_btt->uuid || !nd_btt->ndns || !nd_btt->lbasize)
if (!nd_btt->uuid || !nd_btt->ndns || !nd_btt->lbasize) {
dev_dbg(&nd_btt->dev, "incomplete btt configuration\n");
return -ENODEV;
}
rawsize = nvdimm_namespace_capacity(ndns) - SZ_4K;
if (rawsize < ARENA_MIN_SIZE) {
dev_dbg(&nd_btt->dev, "%s must be at least %ld bytes\n",
dev_name(&ndns->dev), ARENA_MIN_SIZE + SZ_4K);
return -ENXIO;
}
nd_region = to_nd_region(nd_btt->dev.parent);