bnx2x: Allow RX/TX pause control in autoneg

Currently, when link is configured to auto-negotiate the flow control,
disabling RX/TX pause via ethtool doesn't work.

This fixes the behaviour, advertising asymmetric pause in case either one
is exclusively enabled.
Signed-off-by: Yaniv Rosner <yanivr@broadcom.com>
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c

@@ -1889,12 +1889,15 @@ static int bnx2x_set_pauseparam(struct net_device *dev,
 			bp->link_params.req_flow_ctrl[cfg_idx] =
 				BNX2X_FLOW_CTRL_AUTO;
 		}
-		bp->link_params.req_fc_auto_adv = BNX2X_FLOW_CTRL_NONE;
+		bp->link_params.req_fc_auto_adv = 0;
 		if (epause->rx_pause)
 			bp->link_params.req_fc_auto_adv |= BNX2X_FLOW_CTRL_RX;
 
 		if (epause->tx_pause)
 			bp->link_params.req_fc_auto_adv |= BNX2X_FLOW_CTRL_TX;
+
+		if (!bp->link_params.req_fc_auto_adv)
+			bp->link_params.req_fc_auto_adv |= BNX2X_FLOW_CTRL_NONE;
 	}
 
 	DP(BNX2X_MSG_ETHTOOL,

drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c

@@ -3426,13 +3426,19 @@ static void bnx2x_calc_ieee_aneg_adv(struct bnx2x_phy *phy,
 
 	switch (phy->req_flow_ctrl) {
 	case BNX2X_FLOW_CTRL_AUTO:
-		if (params->req_fc_auto_adv == BNX2X_FLOW_CTRL_BOTH)
+		switch (params->req_fc_auto_adv) {
+		case BNX2X_FLOW_CTRL_BOTH:
 			*ieee_fc |= MDIO_COMBO_IEEE0_AUTO_NEG_ADV_PAUSE_BOTH;
-		else
+			break;
+		case BNX2X_FLOW_CTRL_RX:
+		case BNX2X_FLOW_CTRL_TX:
 			*ieee_fc |=
 				MDIO_COMBO_IEEE0_AUTO_NEG_ADV_PAUSE_ASYMMETRIC;
 			break;
-
+		default:
+			break;
+		}
+		break;
 	case BNX2X_FLOW_CTRL_TX:
 		*ieee_fc |= MDIO_COMBO_IEEE0_AUTO_NEG_ADV_PAUSE_ASYMMETRIC;
 		break;