Adding a StateFunc for ToLower on subnet group name

builtin/providers/aws/resource_aws_db_subnet_group.go

@@ -32,6 +32,10 @@ func resourceAwsDbSubnetGroup() *schema.Resource {
 				Type:     schema.TypeString,
 				ForceNew: true,
 				Required: true,
+				StateFunc: func(v interface{}) string {
+					value := v.(string)
+					return strings.ToLower(value)
+				},
 				ValidateFunc: func(v interface{}, k string) (ws []string, errors []error) {
 					value := v.(string)
 					if !regexp.MustCompile(`^[ .0-9A-Za-z-_]+$`).MatchString(value) {
@@ -131,8 +135,8 @@ func resourceAwsDbSubnetGroupRead(d *schema.ResourceData, meta interface{}) erro
 		return fmt.Errorf("Unable to find DB Subnet Group: %#v", describeResp.DBSubnetGroups)
 	}
 
-	d.Set("name", d.Id())
-	d.Set("description", *subnetGroup.DBSubnetGroupDescription)
+	d.Set("name", subnetGroup.DBSubnetGroupName)
+	d.Set("description", subnetGroup.DBSubnetGroupDescription)
 
 	subnets := make([]string, 0, len(subnetGroup.Subnets))
 	for _, s := range subnetGroup.Subnets {