diff --git a/drivers/mtd/nand/au1550nd.c b/drivers/mtd/nand/au1550nd.c
index de190b8..58c55db 100644
--- a/drivers/mtd/nand/au1550nd.c
+++ b/drivers/mtd/nand/au1550nd.c
@@ -538,7 +538,7 @@
 	}
 	nand_phys = (mem_staddr << 4) & 0xFFFC0000;
 
-	p_nand = (void __iomem *)ioremap(nand_phys, 0x1000);
+	p_nand = ioremap(nand_phys, 0x1000);
 
 	/* make controller and MTD agree */
 	if (NAND_CS == 0)
@@ -583,7 +583,7 @@
 	return 0;
 
  outio:
-	iounmap((void *)p_nand);
+	iounmap(p_nand);
 
  outmem:
 	kfree(au1550_mtd);
@@ -604,7 +604,7 @@
 	kfree(au1550_mtd);
 
 	/* Unmap */
-	iounmap((void *)p_nand);
+	iounmap(p_nand);
 }
 
 module_exit(au1550_cleanup);