bnx2x: disable fairness if ETS is enabled

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Vladislav Zolotarov <vladz@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@conan.davemloft.net>

drivers/net/bnx2x/bnx2x_dcb.h

@@ -60,6 +60,8 @@ struct bnx2x_dcbx_port_params {
 #define BNX2X_DCBX_OVERWRITE_SETTINGS_DISABLE		0
 #define BNX2X_DCBX_OVERWRITE_SETTINGS_ENABLE		1
 #define BNX2X_DCBX_OVERWRITE_SETTINGS_INVALID	(BNX2X_DCBX_CONFIG_INV_VALUE)
+#define BNX2X_IS_ETS_ENABLED(bp) ((bp)->dcb_state == BNX2X_DCB_STATE_ON &&\
+				  (bp)->dcbx_port_params.ets.enabled)
 
 struct bnx2x_config_lldp_params {
 	u32 overwrite_settings;

drivers/net/bnx2x/bnx2x_main.c

@@ -1892,8 +1892,12 @@ static void bnx2x_calc_vn_weight_sum(struct bnx2x *bp)
 		bp->vn_weight_sum += vn_min_rate;
 	}
 
-	/* ... only if all min rates are zeros - disable fairness */
-	if (all_zero) {
+	/* if ETS or all min rates are zeros - disable fairness */
+	if (BNX2X_IS_ETS_ENABLED(bp)) {
+		bp->cmng.flags.cmng_enables &=
+					~CMNG_FLAGS_PER_PORT_FAIRNESS_VN;
+		DP(NETIF_MSG_IFUP, "Fairness will be disabled due to ETS\n");
+	} else if (all_zero) {
 		bp->cmng.flags.cmng_enables &=
 					~CMNG_FLAGS_PER_PORT_FAIRNESS_VN;
 		DP(NETIF_MSG_IFUP, "All MIN values are zeroes"