X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;ds=sidebyside;f=drivers%2Fnvdimm%2Fnamespace_devs.c;h=aae7379af4e4c870c23271629e24cc0da12e0dbf;hb=3ea271934d69e7c7a4b2c5c5f28f3aed724cb7a3;hp=62120c38d56bf317537a05342e22e6e08e3630b7;hpb=ddbcfcba5fdc56f30e4d02c3bac8cf965502cece;p=firefly-linux-kernel-4.4.55.git

diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index 62120c38d56b..aae7379af4e4 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -1534,6 +1534,7 @@ static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id)
 static int find_pmem_label_set(struct nd_region *nd_region,
 		struct nd_namespace_pmem *nspm)
 {
+	u64 altcookie = nd_region_interleave_set_altcookie(nd_region);
 	u64 cookie = nd_region_interleave_set_cookie(nd_region);
 	struct nd_namespace_label *nd_label;
 	u8 select_id[NSLABEL_UUID_LEN];
@@ -1542,8 +1543,10 @@ 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
@@ -1552,13 +1555,24 @@ static int find_pmem_label_set(struct nd_region *nd_region,
 	for_each_label(l, nd_label, nd_region->mapping[0].labels) {
 		u64 isetcookie = __le64_to_cpu(nd_label->isetcookie);
 
-		if (isetcookie != cookie)
-			continue;
+		if (isetcookie != cookie) {
+			dev_dbg(&nd_region->dev, "invalid cookie in label: %pUb\n",
+					nd_label->uuid);
+			if (isetcookie != altcookie)
+				continue;
+
+			dev_dbg(&nd_region->dev, "valid altcookie in label: %pUb\n",
+					nd_label->uuid);
+		}
+
+		for (i = 0; nd_region->ndr_mappings; i++) {
+			if (has_uuid_at_pos(nd_region, nd_label->uuid, cookie, i))
+				continue;
+			if (has_uuid_at_pos(nd_region, nd_label->uuid, altcookie, i))
+				continue;
+			break;
+		}
 
-		for (i = 0; nd_region->ndr_mappings; i++)
-			if (!has_uuid_at_pos(nd_region, nd_label->uuid,
-						cookie, i))
-				break;
 		if (i < nd_region->ndr_mappings) {
 			/*
 			 * Give up if we don't find an instance of a