Staging: et131x: clean up WORD2 usage

A little more complex but again move the structure and typedef into into the
documentation
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/et131x/et1310_tx.c

@@ -516,9 +516,10 @@ static int nic_send_packet(struct et131x_adapter *etdev, PMP_TCB pMpTcb)
 			 */
 			if ((pPacket->len - pPacket->data_len) <= 1514) {
 				CurDesc[FragmentNumber].DataBufferPtrHigh = 0;
-				CurDesc[FragmentNumber].word2.bits.
-				    length_in_bytes =
-				    pPacket->len - pPacket->data_len;
+				/* Low 16bits are length, high is vlan and
+				   unused currently so zero */
+				CurDesc[FragmentNumber].word2 =
+					pPacket->len - pPacket->data_len;
 
 				/* NOTE: Here, the dma_addr_t returned from
 				 * pci_map_single() is implicitly cast as a
@@ -536,9 +537,8 @@ static int nic_send_packet(struct et131x_adapter *etdev, PMP_TCB pMpTcb)
 						   PCI_DMA_TODEVICE);
 			} else {
 				CurDesc[FragmentNumber].DataBufferPtrHigh = 0;
-				CurDesc[FragmentNumber].word2.bits.
-				    length_in_bytes =
-				    ((pPacket->len - pPacket->data_len) / 2);
+				CurDesc[FragmentNumber].word2 =
+				    (pPacket->len - pPacket->data_len) / 2;
 
 				/* NOTE: Here, the dma_addr_t returned from
 				 * pci_map_single() is implicitly cast as a
@@ -556,9 +556,8 @@ static int nic_send_packet(struct et131x_adapter *etdev, PMP_TCB pMpTcb)
 						   PCI_DMA_TODEVICE);
 				CurDesc[FragmentNumber].DataBufferPtrHigh = 0;
 
-				CurDesc[FragmentNumber].word2.bits.
-				    length_in_bytes =
-				    ((pPacket->len - pPacket->data_len) / 2);
+				CurDesc[FragmentNumber].word2 =
+				    (pPacket->len - pPacket->data_len) / 2;
 
 				/* NOTE: Here, the dma_addr_t returned from
 				 * pci_map_single() is implicitly cast as a
@@ -579,8 +578,8 @@ static int nic_send_packet(struct et131x_adapter *etdev, PMP_TCB pMpTcb)
 			}
 		} else {
 			CurDesc[FragmentNumber].DataBufferPtrHigh = 0;
-			CurDesc[FragmentNumber].word2.bits.length_in_bytes =
-			    pFragList[loopIndex - 1].size;
+			CurDesc[FragmentNumber].word2 =
+					pFragList[loopIndex - 1].size;
 
 			/* NOTE: Here, the dma_addr_t returned from
 			 * pci_map_page() is implicitly cast as a uint32_t.
@@ -724,7 +723,7 @@ inline void et131x_free_send_packet(struct et131x_adapter *etdev,
 
 			pci_unmap_single(etdev->pdev,
 					 desc->DataBufferPtrLow,
-					 desc->word2.value, PCI_DMA_TODEVICE);
+					 desc->word2, PCI_DMA_TODEVICE);
 
 			add_10bit(&pMpTcb->WrIndexStart, 1);
 			if (INDEX10(pMpTcb->WrIndexStart) >=

drivers/staging/et131x/et1310_tx.h

@@ -63,29 +63,14 @@
 /* Typedefs for Tx Descriptor Ring */
 
 /*
- * TXDESC_WORD2_t structure holds part of the control bits in the Tx Descriptor
- * ring for the ET-1310
- */
-typedef union _txdesc_word2_t {
-	u32 value;
-	struct {
-#ifdef _BIT_FIELDS_HTOL
-		u32 vlan_prio:3;		/* bits 29-31(VLAN priority) */
-		u32 vlan_cfi:1;		/* bit 28(cfi) */
-		u32 vlan_tag:12;		/* bits 16-27(VLAN tag) */
-		u32 length_in_bytes:16;	/* bits  0-15(packet length) */
-#else
-		u32 length_in_bytes:16;	/* bits  0-15(packet length) */
-		u32 vlan_tag:12;		/* bits 16-27(VLAN tag) */
-		u32 vlan_cfi:1;		/* bit 28(cfi) */
-		u32 vlan_prio:3;		/* bits 29-31(VLAN priority) */
-#endif	/* _BIT_FIELDS_HTOL */
-	} bits;
-} TXDESC_WORD2_t, *PTXDESC_WORD2_t;
-
-/*
- * word 3 of the control bits in the Tx Descriptor ring for the
- * ET-1310
+ * word 2 of the control bits in the Tx Descriptor ring for the ET-1310
+ *
+ * 0-15: length of packet
+ * 16-27: VLAN tag
+ * 28: VLAN CFI
+ * 29-31: VLAN priority
+ *
+ * word 3 of the control bits in the Tx Descriptor ring for the ET-1310
  *
  * 0: last packet in the sequence
  * 1: first packet in the sequence
@@ -108,7 +93,7 @@ typedef union _txdesc_word2_t {
 typedef struct _tx_desc_entry_t {
 	u32 DataBufferPtrHigh;
 	u32 DataBufferPtrLow;
-	TXDESC_WORD2_t word2;	/* control words how to xmit the */
+	u32 word2;	/* control words how to xmit the */
 	u32 word3;	/* data (detailed above) */
 } TX_DESC_ENTRY_t, *PTX_DESC_ENTRY_t;