linux-kernel - [PATCH net-next v2 15/21] net: ravb: Simplify ravb

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Message-Id: <20231214114600.2451162-16-claudiu.beznea.uj@bp.renesas.com>
Date:   Thu, 14 Dec 2023 13:45:54 +0200
From:   Claudiu <claudiu.beznea@...on.dev>
To:     s.shtylyov@....ru, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com, richardcochran@...il.com,
        p.zabel@...gutronix.de, yoshihiro.shimoda.uh@...esas.com,
        wsa+renesas@...g-engineering.com, geert+renesas@...der.be
Cc:     netdev@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: [PATCH net-next v2 15/21] net: ravb: Simplify ravb_resume()

From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>

Remove explicit calls to functions that are called ravb_open(). There is
no need to have them doubled now that the ravb_open() already contains
what is needed for the interface configuration. Along with it, PTP needed
configurations were moved to ravb_wol_restore(). With this, code in
ravb_resume() is simpler.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
---

Changes in v2:
- none; this patch is new

 drivers/net/ethernet/renesas/ravb_main.c | 60 ++++++++++--------------
 1 file changed, 24 insertions(+), 36 deletions(-)

diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 16450bf241cd..b581666e341f 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -2978,6 +2978,20 @@ static int ravb_wol_restore(struct net_device *ndev)
 {
 	struct ravb_private *priv = netdev_priv(ndev);
 	const struct ravb_hw_info *info = priv->info;
+	int error;
+
+	/* Set reset mode to rearm the WoL logic. */
+	error = ravb_set_reset_mode(ndev);
+	if (error)
+		return error;
+
+	/* Set AVB config mode. */
+	error = ravb_set_config_mode(ndev);
+	if (error)
+		return error;
+
+	if (priv->info->ccc_gac)
+		ravb_ptp_init(ndev, priv->pdev);
 
 	if (info->nc_queues)
 		napi_enable(&priv->napi[RAVB_NC]);
@@ -3017,55 +3031,29 @@ static int ravb_resume(struct device *dev)
 {
 	struct net_device *ndev = dev_get_drvdata(dev);
 	struct ravb_private *priv = netdev_priv(ndev);
-	const struct ravb_hw_info *info = priv->info;
 	int ret;
 
 	ret = reset_control_deassert(priv->rstc);
 	if (ret)
 		return ret;
 
-	/* If WoL is enabled set reset mode to rearm the WoL logic */
+	if (!netif_running(ndev))
+		return 0;
+
+	/* If WoL is enabled restore the interface. */
 	if (priv->wol_enabled) {
-		ret = ravb_set_reset_mode(ndev);
+		ret = ravb_wol_restore(ndev);
 		if (ret)
 			return ret;
 	}
 
-	/* All register have been reset to default values.
-	 * Restore all registers which where setup at probe time and
-	 * reopen device if it was running before system suspended.
-	 */
-
-	/* Set AVB config mode */
-	ret = ravb_set_config_mode(ndev);
-	if (ret)
+	/* Reopening the interface will restore the device to the working state. */
+	ret = ravb_open(ndev);
+	if (ret < 0)
 		return ret;
 
-	ret = ravb_set_gti(ndev);
-	if (ret)
-		return ret;
-
-	if (info->internal_delay)
-		ravb_set_delay_mode(ndev);
-
-	/* Restore descriptor base address table */
-	ravb_write(ndev, priv->desc_bat_dma, DBAT);
-
-	if (priv->info->ccc_gac)
-		ravb_ptp_init(ndev, priv->pdev);
-
-	if (netif_running(ndev)) {
-		if (priv->wol_enabled) {
-			ret = ravb_wol_restore(ndev);
-			if (ret)
-				return ret;
-		}
-		ret = ravb_open(ndev);
-		if (ret < 0)
-			return ret;
-		ravb_set_rx_mode(ndev);
-		netif_device_attach(ndev);
-	}
+	ravb_set_rx_mode(ndev);
+	netif_device_attach(ndev);
 
 	return ret;
 }
-- 
2.39.2