bnxt_en: Eliminate unintended link toggle during FW reset

[ Upstream commit 7c492a2530c1f05441da541307c2534230dfd59b ]

If the flow control settings have been changed, a subsequent FW reset
may cause the ethernet link to toggle unnecessarily.  This link toggle
will increase the down time by a few seconds.

The problem is caused by bnxt_update_phy_setting() detecting a false
mismatch in the flow control settings between the stored software
settings and the current FW settings after the FW reset.  This mismatch
is caused by the AUTONEG bit added to link_info->req_flow_ctrl in an
inconsistent way in bnxt_set_pauseparam() in autoneg mode.  The AUTONEG
bit should not be added to link_info->req_flow_ctrl.

Reviewed-by: Colin Winegarden <colin.winegarden@broadcom.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 9e5251c427a36f0b1f9026018ed1993d6a75a0ba..401d9718841fc38b8f9e6e4587f33b0abdfb5069 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -1008,9 +1008,7 @@ static int bnxt_set_pauseparam(struct net_device *dev,
                }
 
                link_info->autoneg |= BNXT_AUTONEG_FLOW_CTRL;
-               if (bp->hwrm_spec_code >= 0x10201)
-                       link_info->req_flow_ctrl =
-                               PORT_PHY_CFG_REQ_AUTO_PAUSE_AUTONEG_PAUSE;
+               link_info->req_flow_ctrl = 0;
        } else {
                /* when transition from auto pause to force pause,
                 * force a link change