iowrite32(reg_value, iobase + MAC_REG_ENCFG);
 }
 
+static void vt6655_mac_clear_bits(void __iomem *iobase, u32 mask)
+{
+       u32 reg_value;
+
+       reg_value = ioread32(iobase + MAC_REG_ENCFG);
+       reg_value = reg_value & ~mask;
+       iowrite32(reg_value, iobase + MAC_REG_ENCFG);
+}
+
 static void vt6655_mac_en_protect_md(void __iomem *iobase)
 {
        vt6655_mac_set_bits(iobase, ENCFG_PROTECTMD);
 }
 
+static void vt6655_mac_dis_protect_md(void __iomem *iobase)
+{
+       vt6655_mac_clear_bits(iobase, ENCFG_PROTECTMD);
+}
+
 /*
  * Initialisation of MAC & BBP registers
  */
                if (conf->use_cts_prot)
                        vt6655_mac_en_protect_md(priv->port_offset);
                else
-                       MACvDisableProtectMD(priv->port_offset);
+                       vt6655_mac_dis_protect_md(priv->port_offset);
        }
 
        if (changed & BSS_CHANGED_ERP_SLOT) {
 
  * Revision History:
  *      07-01-2003 Bryan YC Fan:  Re-write codes to support VT3253 spec.
  *      08-25-2003 Kyle Hsu:      Porting MAC functions from sim53.
- *      09-03-2003 Bryan YC Fan:  Add MACvDisableProtectMD & vt6655_mac_en_protect_md
+ *      09-03-2003 Bryan YC Fan:  Add vt6655_mac_dis_protect_md & vt6655_mac_en_protect_md
  */
 
 #ifndef __MAC_H__
 #define MACvSelectPage1(iobase)                                \
        iowrite8(1, iobase + MAC_REG_PAGE1SEL)
 
-#define MACvDisableProtectMD(iobase)                                   \
-do {                                                                   \
-       unsigned long dwOrgValue;                                       \
-       dwOrgValue = ioread32(iobase + MAC_REG_ENCFG);                  \
-       dwOrgValue = dwOrgValue & ~ENCFG_PROTECTMD;                     \
-       iowrite32((u32)dwOrgValue, iobase + MAC_REG_ENCFG);             \
-} while (0)
-
 #define MACvEnableBarkerPreambleMd(iobase)                             \
 do {                                                                   \
        unsigned long dwOrgValue;                                       \