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Date:   Wed, 17 Apr 2019 09:33:05 +0200
From:   Jose Abreu <>
Cc:     Jose Abreu <>,
        Joao Pinto <>,
        "David S . Miller" <>,
        Giuseppe Cavallaro <>,
        Alexandre Torgue <>
Subject: [PATCH net-next 2/2] net: stmmac: Set Flow Control to automatic mode in the driver

By default Flow Control feature is not being enabled in stmmac.

This is a useful feature that can prevent loss of packets and now that
XGMAC already supports it (along with GMAC and QoS) it makes sense to
activate it.

Switch the module parameter to FLOW_AUTO so that Flow Control is

Signed-off-by: Jose Abreu <>
Cc: Joao Pinto <>
Cc: David S. Miller <>
Cc: Giuseppe Cavallaro <>
Cc: Alexandre Torgue <>
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index a26e36dbb5df..7a895a2889e3 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -74,7 +74,7 @@ MODULE_PARM_DESC(phyaddr, "Physical device address");
-static int flow_ctrl = FLOW_OFF;
+static int flow_ctrl = FLOW_AUTO;
 module_param(flow_ctrl, int, 0644);
 MODULE_PARM_DESC(flow_ctrl, "Flow control ability [on/off]");

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