Index: head/sys/dev/sfxge/common/efx_mcdi.h
===================================================================
--- head/sys/dev/sfxge/common/efx_mcdi.h
+++ head/sys/dev/sfxge/common/efx_mcdi.h
@@ -386,6 +386,11 @@
 #define	MCDI_CMD_DWORD_FIELD(_edp, _field)				\
 	EFX_DWORD_FIELD(*_edp, MC_CMD_ ## _field)
 
+#define EFX_MCDI_HAVE_PRIVILEGE(mask, priv)              \
+	(((mask) &                                  \
+	(MC_CMD_PRIVILEGE_MASK_IN_GRP_ ## priv)) == \
+	(MC_CMD_PRIVILEGE_MASK_IN_GRP_ ## priv))
+
 #ifdef	__cplusplus
 }
 #endif
Index: head/sys/dev/sfxge/common/hunt_mcdi.c
===================================================================
--- head/sys/dev/sfxge/common/hunt_mcdi.c
+++ head/sys/dev/sfxge/common/hunt_mcdi.c
@@ -412,9 +412,8 @@
 	 * Admin privilege must be used prior to introduction of
 	 * specific flag.
 	 */
-	*supportedp = (encp->enc_privilege_mask &
-	    MC_CMD_PRIVILEGE_MASK_IN_GRP_ADMIN)
-	    == MC_CMD_PRIVILEGE_MASK_IN_GRP_ADMIN;
+	*supportedp =
+	    EFX_MCDI_HAVE_PRIVILEGE(encp->enc_privilege_mask, ADMIN);
 
 	return (0);
 }
@@ -436,12 +435,9 @@
 	 * introduction of change mac spoofing privilege (at v4.7)
 	 */
 	*supportedp =
-	    ((privilege_mask & MC_CMD_PRIVILEGE_MASK_IN_GRP_CHANGE_MAC) ==
-	    MC_CMD_PRIVILEGE_MASK_IN_GRP_CHANGE_MAC) ||
-	    ((privilege_mask & MC_CMD_PRIVILEGE_MASK_IN_GRP_MAC_SPOOFING) ==
-	    MC_CMD_PRIVILEGE_MASK_IN_GRP_MAC_SPOOFING) ||
-	    ((privilege_mask & MC_CMD_PRIVILEGE_MASK_IN_GRP_ADMIN) ==
-	    MC_CMD_PRIVILEGE_MASK_IN_GRP_ADMIN);
+	    EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, CHANGE_MAC) ||
+	    EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, MAC_SPOOFING) ||
+	    EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, ADMIN);
 
 	return (0);
 }
@@ -463,12 +459,9 @@
 	 * introduction of mac spoofing TX privilege (at v4.7)
 	 */
 	*supportedp =
-	    ((privilege_mask & MC_CMD_PRIVILEGE_MASK_IN_GRP_MAC_SPOOFING_TX) ==
-	    MC_CMD_PRIVILEGE_MASK_IN_GRP_MAC_SPOOFING_TX) ||
-	    ((privilege_mask & MC_CMD_PRIVILEGE_MASK_IN_GRP_MAC_SPOOFING) ==
-	    MC_CMD_PRIVILEGE_MASK_IN_GRP_MAC_SPOOFING) ||
-	    ((privilege_mask & MC_CMD_PRIVILEGE_MASK_IN_GRP_ADMIN) ==
-	    MC_CMD_PRIVILEGE_MASK_IN_GRP_ADMIN);
+	    EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, MAC_SPOOFING_TX) ||
+	    EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, MAC_SPOOFING) ||
+	    EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, ADMIN);
 
 	return (0);
 }
@@ -490,10 +483,8 @@
 	 * specific flag.
 	 */
 	*supportedp =
-	    ((privilege_mask & MC_CMD_PRIVILEGE_MASK_IN_GRP_LINK) ==
-	    MC_CMD_PRIVILEGE_MASK_IN_GRP_LINK) ||
-	    ((privilege_mask & MC_CMD_PRIVILEGE_MASK_IN_GRP_ADMIN) ==
-	    MC_CMD_PRIVILEGE_MASK_IN_GRP_ADMIN);
+	    EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, LINK) ||
+	    EFX_MCDI_HAVE_PRIVILEGE(privilege_mask, ADMIN);
 
 	return (0);
 }