netdev - [PATCH net 4/5] net: stmmac: Fix the logic of checking if RX Watchdog must be enabled

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Message-Id: <359402e75c6d066175a4dcc88a6c511d7e71f7e3.1546958941.git.joabreu@synopsys.com>
Date:   Tue,  8 Jan 2019 15:51:08 +0100
From:   Jose Abreu <jose.abreu@...opsys.com>
To:     netdev@...r.kernel.org
Cc:     Jose Abreu <jose.abreu@...opsys.com>,
        Joao Pinto <joao.pinto@...opsys.com>,
        "David S . Miller" <davem@...emloft.net>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>
Subject: [PATCH net 4/5] net: stmmac: Fix the logic of checking if RX Watchdog must be enabled

RX Watchdog can be disabled by platform definitions but currently we are
initializing the descriptors before checking if Watchdog must be
disabled or not.

Fix this by checking earlier if user wants Watchdog disabled or not.

Cc: Joao Pinto <jpinto@...opsys.com>
Cc: David S. Miller <davem@...emloft.net>
Cc: Giuseppe Cavallaro <peppe.cavallaro@...com>
Cc: Alexandre Torgue <alexandre.torgue@...com>
Signed-off-by: Jose Abreu <joabreu@...opsys.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 24 +++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 0e0a0789c2ed..83ceb1a12e77 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -4168,6 +4168,18 @@ static int stmmac_hw_init(struct stmmac_priv *priv)
 			return ret;
 	}
 
+	/* Rx Watchdog is available in the COREs newer than the 3.40.
+	 * In some case, for example on bugged HW this feature
+	 * has to be disable and this can be done by passing the
+	 * riwt_off field from the platform.
+	 */
+	if (((priv->synopsys_id >= DWMAC_CORE_3_50) ||
+	    (priv->plat->has_xgmac)) && (!priv->plat->riwt_off)) {
+		priv->use_riwt = 1;
+		dev_info(priv->device,
+			 "Enable RX Mitigation via HW Watchdog Timer\n");
+	}
+
 	return 0;
 }
 
@@ -4300,18 +4312,6 @@ int stmmac_dvr_probe(struct device *device,
 	if (flow_ctrl)
 		priv->flow_ctrl = FLOW_AUTO;	/* RX/TX pause on */
 
-	/* Rx Watchdog is available in the COREs newer than the 3.40.
-	 * In some case, for example on bugged HW this feature
-	 * has to be disable and this can be done by passing the
-	 * riwt_off field from the platform.
-	 */
-	if (((priv->synopsys_id >= DWMAC_CORE_3_50) ||
-	    (priv->plat->has_xgmac)) && (!priv->plat->riwt_off)) {
-		priv->use_riwt = 1;
-		dev_info(priv->device,
-			 "Enable RX Mitigation via HW Watchdog Timer\n");
-	}
-
 	/* Setup channels NAPI */
 	maxq = max(priv->plat->rx_queues_to_use, priv->plat->tx_queues_to_use);
 
-- 
2.7.4