From: Dan Williams <dan.j.williams@intel.com>
Date: Fri, 16 Sep 2016 01:08:05 +0000 (-0700)
Subject: libnvdimm, namespace: debug invalid interleave-set-cookie values
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4765218db79561ce13922806716eadb138c65439;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

libnvdimm, namespace: debug invalid interleave-set-cookie values

If platform firmware fails to populate unique / non-zero serial number
data for each nvdimm in an interleave-set it may cause pmem region
initialization to fail.  Add a debug message for this case.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---

diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index 6b0449bd7720..4f0a21308417 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -1584,8 +1584,10 @@ static int find_pmem_label_set(struct nd_region *nd_region,
 	int rc = -ENODEV, l;
 	u16 i;
 
-	if (cookie == 0)
+	if (cookie == 0) {
+		dev_dbg(&nd_region->dev, "invalid interleave-set-cookie\n");
 		return -ENXIO;
+	}
 
 	/*
 	 * Find a complete set of labels by uuid.  By definition we can start