diff --git a/drivers/mtd/nand/fsl_elbc_nand.c b/drivers/mtd/nand/fsl_elbc_nand.c
index d32f1d3b52f7fa3f44ac33dadb7d560b1c091682..bcf60800c3ce7f5e0489972ebe7a3e3f83d225df 100644
--- a/drivers/mtd/nand/fsl_elbc_nand.c
+++ b/drivers/mtd/nand/fsl_elbc_nand.c
@@ -874,7 +874,7 @@ static int fsl_elbc_nand_probe(struct platform_device *pdev)
 		goto err;
 	}
 
-	priv->mtd.name = kasprintf(GFP_KERNEL, "%x.flash", (unsigned)res.start);
+	priv->mtd.name = kasprintf(GFP_KERNEL, "%llx.flash", (u64)res.start);
 	if (!priv->mtd.name) {
 		ret = -ENOMEM;
 		goto err;
diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c
index 33440803cf6247412e7d443b1a58a66443160197..90ca7e75d6f038e4cefb365ee2a436eac4ac8cc2 100644
--- a/drivers/mtd/nand/fsl_ifc_nand.c
+++ b/drivers/mtd/nand/fsl_ifc_nand.c
@@ -1100,7 +1100,7 @@ static int fsl_ifc_nand_probe(struct platform_device *dev)
 		    IFC_NAND_EVTER_INTR_FTOERIR_EN |
 		    IFC_NAND_EVTER_INTR_WPERIR_EN,
 		    &ifc->ifc_nand.nand_evter_intr_en);
-	priv->mtd.name = kasprintf(GFP_KERNEL, "%x.flash", (unsigned)res.start);
+	priv->mtd.name = kasprintf(GFP_KERNEL, "%llx.flash", (u64)res.start);
 	if (!priv->mtd.name) {
 		ret = -ENOMEM;
 		goto err;