From 9dec4892ca9afd6aad3c9c9e6c17480ecbd04440 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Fri, 22 Apr 2016 12:26:05 -0700 Subject: [PATCH] libnvdimm, btt: add btt startup debug Report the reason for btt probe failures when debug is enabled. Signed-off-by: Dan Williams --- drivers/nvdimm/btt.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c index f068b6513cd2..af09d6c26709 100644 --- a/drivers/nvdimm/btt.c +++ b/drivers/nvdimm/btt.c @@ -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); -- 2.20.1