diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index ead52b3..b20346e 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -706,6 +706,9 @@
 	      void **virt, resource_size_t *phys)
 {
 	*retlen = 0;
+	*virt = NULL;
+	if (phys)
+		*phys = 0;
 	if (!mtd->_point)
 		return -EOPNOTSUPP;
 	if (from < 0 || from > mtd->size || len > mtd->size - from)