staging: vt6656: rxtx s_vFillRTSHead create union of vnt_rts*/vnt_cts* structures.

Only one of vnt_rts*/vnt_cts* structures are accessed at any one time.

Join these structures in to a single union.

These will eventually form the tail structure of vnt_tx_buffer and
include structures vnt_tx_datahead*

Structures in s_vFillCTSHead will join in next patch series.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/vt6656/rxtx.c b/drivers/staging/vt6656/rxtx.c
index a45cc9f..0785431 100644 (file)
--- a/drivers/staging/vt6656/rxtx.c
+++ b/drivers/staging/vt6656/rxtx.c
@@ -720,48 +720,39 @@ static void s_vFillRTSHead(struct vnt_private *pDevice, u8 byPktType,
        void *pvRTS, u32 cbFrameLength, int bNeedAck,
        struct ethhdr *psEthHeader, u16 wCurrentRate, u8 byFBOption)
 {
+       union vnt_tx_data_head *head = pvRTS;
 
-    if (pvRTS == NULL)
-       return;
+       if (!head)
+               return;
 
     // Note: So far RTSHead doesn't appear in ATIM & Beacom DMA, so we don't need to take them into account.
     //       Otherwise, we need to modified codes for them.
     if (byPktType == PK_TYPE_11GB || byPktType == PK_TYPE_11GA) {
         if (byFBOption == AUTO_FB_NONE) {
-               struct vnt_rts_g *pBuf = (struct vnt_rts_g *)pvRTS;
-
-               vnt_rxtx_rts_g_head(pDevice, pBuf,
+               vnt_rxtx_rts_g_head(pDevice, &head->rts_g,
                                psEthHeader, byPktType, cbFrameLength,
                                bNeedAck, wCurrentRate, byFBOption);
         }
         else {
-               struct vnt_rts_g_fb *pBuf = (struct vnt_rts_g_fb *)pvRTS;
-
-               vnt_rxtx_rts_g_fb_head(pDevice, pBuf,
+               vnt_rxtx_rts_g_fb_head(pDevice, &head->rts_g_fb,
                                psEthHeader, byPktType, cbFrameLength,
                                bNeedAck, wCurrentRate, byFBOption);
         } // if (byFBOption == AUTO_FB_NONE)
     }
     else if (byPktType == PK_TYPE_11A) {
         if (byFBOption == AUTO_FB_NONE) {
-               struct vnt_rts_ab *pBuf = (struct vnt_rts_ab *)pvRTS;
-
-               vnt_rxtx_rts_ab_head(pDevice, pBuf,
+               vnt_rxtx_rts_ab_head(pDevice, &head->rts_ab,
                                psEthHeader, byPktType, cbFrameLength,
                                bNeedAck, wCurrentRate, byFBOption);
         }
         else {
-               struct vnt_rts_a_fb *pBuf = (struct vnt_rts_a_fb *)pvRTS;
-
-               vnt_rxtx_rts_a_fb_head(pDevice, pBuf,
+               vnt_rxtx_rts_a_fb_head(pDevice, &head->rts_a_fb,
                                psEthHeader, byPktType, cbFrameLength,
                                bNeedAck, wCurrentRate, byFBOption);
         }
     }
     else if (byPktType == PK_TYPE_11B) {
-       struct vnt_rts_ab *pBuf = (struct vnt_rts_ab *)pvRTS;
-
-       vnt_rxtx_rts_ab_head(pDevice, pBuf,
+       vnt_rxtx_rts_ab_head(pDevice, &head->rts_ab,
                        psEthHeader, byPktType, cbFrameLength,
                        bNeedAck, wCurrentRate, byFBOption);
     }

diff --git a/drivers/staging/vt6656/rxtx.h b/drivers/staging/vt6656/rxtx.h
index ad62052..4bbee1c 100644 (file)
--- a/drivers/staging/vt6656/rxtx.h
+++ b/drivers/staging/vt6656/rxtx.h
@@ -168,6 +168,18 @@ struct vnt_cts_fb {
        u16 reserved2;
 } __packed;
 
+union vnt_tx_data_head {
+       /* rts g */
+       struct vnt_rts_g rts_g;
+       struct vnt_rts_g_fb rts_g_fb;
+       /* rts a/b */
+       struct vnt_rts_ab rts_ab;
+       struct vnt_rts_a_fb rts_a_fb;
+       /* cts g */
+       struct vnt_cts cts_g;
+       struct vnt_cts_fb cts_g_fb;
+};
+
 struct vnt_tx_buffer {
        u8 byType;
        u8 byPKTNO;