[PATCH net] net: stmmac: fix ethtool flow control not able to get/set

[Weifeng Voon]

From: "Tan, Tee Min" <tee.min....@intel.com>

Currently ethtool was not able to get/set the flow control due to a
missing "!". It will always return -EOPNOTSUPP even the device is
flow control supported.

This patch fixes the condition check for ethtool flow control get/set
function for ETHTOOL_LINK_MODE_Asym_Pause_BIT.

Fixes: 3c1bcc8614db (“net: ethernet: Convert phydev advertize and supported 
from u32 to link mode”)
Signed-off-by: Tan, Tee Min <tee.min....@intel.com>
Reviewed-by: Ong Boon Leong <boon.leong....@intel.com>
Signed-off-by: Voon, Weifeng <weifeng.v...@intel.com@intel.com>

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c 
b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
index 3c749c3..e09522c 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
@@ -460,7 +460,7 @@ static void stmmac_ethtool_gregs(struct net_device *dev,
        } else {
                if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
                                       netdev->phydev->supported) ||
-                   linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
+                   !linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
                                      netdev->phydev->supported))
                        return;
        }
@@ -491,7 +491,7 @@ static void stmmac_ethtool_gregs(struct net_device *dev,
        } else {
                if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
                                       phy->supported) ||
-                   linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
+                   !linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
                                      phy->supported))
                        return -EOPNOTSUPP;
        }
-- 
1.9.1