diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c
index c5aa179..39db9d1 100644
--- a/arch/powerpc/sysdev/fsl_rio.c
+++ b/arch/powerpc/sysdev/fsl_rio.c
@@ -1076,8 +1076,9 @@
 
 	INIT_LIST_HEAD(&port->dbells);
 	port->iores.start = law_start;
-	port->iores.end = law_start + law_size;
+	port->iores.end = law_start + law_size - 1;
 	port->iores.flags = IORESOURCE_MEM;
+	port->iores.name = "rio_io_win";
 
 	priv->bellirq = irq_of_parse_and_map(dev->node, 2);
 	priv->txirq = irq_of_parse_and_map(dev->node, 3);
@@ -1155,14 +1156,15 @@
 		out_be32((priv->regs_win + RIO_ISR_AACR), RIO_ISR_AACR_AA);
 
 	/* Configure maintenance transaction window */
-	out_be32(&priv->maint_atmu_regs->rowbar, 0x000c0000);
-	out_be32(&priv->maint_atmu_regs->rowar, 0x80077015);
+	out_be32(&priv->maint_atmu_regs->rowbar, law_start >> 12);
+	out_be32(&priv->maint_atmu_regs->rowar, 0x80077015);	/* 4M */
 
 	priv->maint_win = ioremap(law_start, RIO_MAINT_WIN_SIZE);
 
 	/* Configure outbound doorbell window */
-	out_be32(&priv->dbell_atmu_regs->rowbar, 0x000c0400);
-	out_be32(&priv->dbell_atmu_regs->rowar, 0x8004200b);
+	out_be32(&priv->dbell_atmu_regs->rowbar,
+			(law_start + RIO_MAINT_WIN_SIZE) >> 12);
+	out_be32(&priv->dbell_atmu_regs->rowar, 0x8004200b);	/* 4k */
 	fsl_rio_doorbell_init(port);
 
 	return 0;