--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -249,6 +249,7 @@ static int m25p_probe(struct spi_device
 	if (ret)
 		return ret;
 
+	memset(&ppdata, '\0', sizeof(ppdata));
 	ppdata.of_node = spi->dev.of_node;
 
 	return mtd_device_parse_register(&nor->mtd,