--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -1244,6 +1244,7 @@ static int m25p_probe(struct spi_device 
 	if (info->flags & M25P_NO_ERASE)
 		flash->mtd.flags |= MTD_NO_ERASE;
 
+	memset(&ppdata, '\0', sizeof(ppdata));
 	ppdata.of_node = spi->dev.of_node;
 	flash->mtd.dev.parent = &spi->dev;
 	flash->page_size = info->page_size;
