diff --git a/sys/compat/linuxkpi/common/include/linux/device.h b/sys/compat/linuxkpi/common/include/linux/device.h
--- a/sys/compat/linuxkpi/common/include/linux/device.h
+++ b/sys/compat/linuxkpi/common/include/linux/device.h
@@ -317,6 +317,9 @@
 	dev->driver_data = data;
 }
 
+/* XXX-BZ this is a hack as DMA bits are in PCI instead of here. */
+uint64_t lkpi_dma_get_mask(struct device *dev);
+
 static inline struct device *
 get_device(struct device *dev)
 {
diff --git a/sys/compat/linuxkpi/common/src/linux_pci.c b/sys/compat/linuxkpi/common/src/linux_pci.c
--- a/sys/compat/linuxkpi/common/src/linux_pci.c
+++ b/sys/compat/linuxkpi/common/src/linux_pci.c
@@ -138,6 +138,7 @@
 	struct resource	*res_table[PCIR_MAX_BAR_0 + 1];
 };
 
+/* XXX-BZ this is device not pci specific */
 struct linux_dma_priv {
 	uint64_t	dma_mask;
 	bus_dma_tag_t	dmat;
@@ -242,6 +243,19 @@
 	return (-error);
 }
 
+uint64_t
+lkpi_dma_get_mask(struct device *dev)
+{
+	struct linux_dma_priv *priv;
+
+	priv = dev->dma_priv;
+	if (priv != NULL)
+		return (priv->dma_mask);
+
+	/* If in doubt return 32bit. */
+	return (DMA_BIT_MASK(32));
+}
+
 int
 linux_dma_tag_init_coherent(struct device *dev, u64 dma_mask)
 {