diff --git a/drivers/staging/et131x/et1310_address_map.h b/drivers/staging/et131x/et1310_address_map.h
index 6c69a15dbbe..6294d3814e7 100644
--- a/drivers/staging/et131x/et1310_address_map.h
+++ b/drivers/staging/et131x/et1310_address_map.h
@@ -173,31 +173,15 @@ typedef struct _GLOBAL_t {			/* Location: */
 /* START OF TXDMA REGISTER ADDRESS MAP */
 
 /*
- * structure for txdma control status reg in txdma address map
- * located at address 0x1000
+ * txdma control status reg at address 0x1000
  */
-typedef union _TXDMA_CSR_t {
-	u32 value;
-	struct {
-#ifdef _BIT_FIELDS_HTOL
-		u32 unused2:19;		/* bits 13-31 */
-		u32 traffic_class:4;	/* bits 9-12 */
-		u32 sngl_epkt_mode:1;	/* bit 8 */
-		u32 cache_thrshld:4;	/* bits 4-7 */
-		u32 unused1:2;		/* bits 2-3 */
-		u32 drop_TLP_disable:1;	/* bit 1 */
-		u32 halt:1;		/* bit 0 */
-#else
-		u32 halt:1;		/* bit 0 */
-		u32 drop_TLP_disable:1;	/* bit 1 */
-		u32 unused1:2;		/* bits 2-3 */
-		u32 cache_thrshld:4;	/* bits 4-7 */
-		u32 sngl_epkt_mode:1;	/* bit 8 */
-		u32 traffic_class:4;	/* bits 9-12 */
-		u32 unused2:19;		/* bits 13-31 */
-#endif
-	} bits;
-} TXDMA_CSR_t, *PTXDMA_CSR_t;
+
+#define ET_TXDMA_CSR_HALT	0x00000001
+#define ET_TXDMA_DROP_TLP	0x00000002
+#define ET_TXDMA_CACHE_THRS	0x000000F0
+#define ET_TXDMA_CACHE_SHIFT	4
+#define ET_TXDMA_SNGL_EPKT	0x00000100
+#define ET_TXDMA_CLASS		0x00001E00
 
 /*
  * structure for txdma packet ring base address hi reg in txdma address map
@@ -274,7 +258,7 @@ extern inline void add_10bit(u32 *v, int n)
  * Located at address 0x1000
  */
 typedef struct _TXDMA_t {		/* Location: */
-	TXDMA_CSR_t csr;		/*  0x1000 */
+	u32 csr;			/*  0x1000 */
 	u32 pr_base_hi;			/*  0x1004 */
 	u32 pr_base_lo;			/*  0x1008 */
 	TXDMA_PR_NUM_DES_t pr_num_des;	/*  0x100C */
diff --git a/drivers/staging/et131x/et1310_tx.c b/drivers/staging/et131x/et1310_tx.c
index 387a697c4af..94f7752e2cc 100644
--- a/drivers/staging/et131x/et1310_tx.c
+++ b/drivers/staging/et131x/et1310_tx.c
@@ -267,7 +267,8 @@ void ConfigTxDmaRegs(struct et131x_adapter *etdev)
 void et131x_tx_dma_disable(struct et131x_adapter *etdev)
 {
 	/* Setup the tramsmit dma configuration register */
-	writel(0x101, &etdev->regs->txdma.csr.value);
+	writel(ET_TXDMA_CSR_HALT|ET_TXDMA_SNGL_EPKT,
+					&etdev->regs->txdma.csr);
 }
 
 /**
@@ -278,20 +279,16 @@ void et131x_tx_dma_disable(struct et131x_adapter *etdev)
  */
 void et131x_tx_dma_enable(struct et131x_adapter *etdev)
 {
-	if (etdev->RegistryPhyLoopbk) {
+	u32 csr = ET_TXDMA_SNGL_EPKT;
+	if (etdev->RegistryPhyLoopbk)
 		/* TxDMA is disabled for loopback operation. */
-		writel(0x101, &etdev->regs->txdma.csr.value);
-	} else {
-		TXDMA_CSR_t csr = { 0 };
-
+		csr |= ET_TXDMA_CSR_HALT;
+	else
 		/* Setup the transmit dma configuration register for normal
 		 * operation
 		 */
-		csr.bits.sngl_epkt_mode = 1;
-		csr.bits.halt = 0;
-		csr.bits.cache_thrshld = PARM_DMA_CACHE_DEF;
-		writel(csr.value, &etdev->regs->txdma.csr.value);
-	}
+		csr |= PARM_DMA_CACHE_DEF << ET_TXDMA_CACHE_SHIFT;
+	writel(csr, &etdev->regs->txdma.csr);
 }
 
 /**