#include <linux/serial_core.h>
 #include <linux/device.h>
 #include <linux/mm.h>
+#include <linux/dma-mapping.h>
 #include <linux/time.h>
 #include <linux/timex.h>
 #include <linux/delay.h>
        },
 };
 
+
 static struct platform_device ep93xx_ohci_device = {
        .name           = "ep93xx-ohci",
        .id             = -1,
        .dev            = {
-               .dma_mask               = (void *)0xffffffff,
-               .coherent_dma_mask      = 0xffffffff,
+               .dma_mask               = &ep93xx_ohci_device.dev.coherent_dma_mask,
+               .coherent_dma_mask      = DMA_BIT_MASK(32),
        },
        .num_resources  = ARRAY_SIZE(ep93xx_ohci_resources),
        .resource       = ep93xx_ohci_resources,