ice: Fix dead device link issue with flow control

[ Upstream commit 0f5d4c21 ]

Setting Rx or Tx pause parameter currently results in link loss on the
interface, requiring the platform/host to be cold power cycled. Fix it.
Signed-off-by: Akeem G Abodunrin <akeem.g.abodunrin@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/net/ethernet/intel/ice/ice_ethtool.c

@@ -797,10 +797,15 @@ ice_set_pauseparam(struct net_device *netdev, struct ethtool_pauseparam *pause)
 	}
 
 	if (!test_bit(__ICE_DOWN, pf->state)) {
-		/* Give it a little more time to try to come back */
+		/* Give it a little more time to try to come back. If still
+		 * down, restart autoneg link or reinitialize the interface.
+		 */
 		msleep(75);
 		if (!test_bit(__ICE_DOWN, pf->state))
 			return ice_nway_reset(netdev);
+
+		ice_down(vsi);
+		ice_up(vsi);
 	}
 
 	return err;