netdev - [PATCH net-next 07/14] net: stmmac: remove unnecessary priv->eee

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <E1tffdX-003ZI5-UV@rmk-PC.armlinux.org.uk>
Date: Wed, 05 Feb 2025 13:40:15 +0000
From: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To: Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>
Cc: Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	netdev@...r.kernel.org,
	linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH net-next 07/14] net: stmmac: remove unnecessary
 priv->eee_enabled tests

Phylink will not call the mac_disable_tx_lpi() and mac_enable_tx_lpi()
methods randomly - the first method to be called will be the enable
method, and then after, the disable method will be called once between
subsequent enable calls. Thus there is a guaranteed ordering.

Therefore, we know the previous state of priv->eee_enabled, and can
remove it from both methods.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 .../net/ethernet/stmicro/stmmac/stmmac_main.c | 37 +++++++++----------
 1 file changed, 17 insertions(+), 20 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 6c8685c30022..695e75de41b3 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -1046,18 +1046,17 @@ static void stmmac_mac_disable_tx_lpi(struct phylink_config *config)
 
 	mutex_lock(&priv->lock);
 
-	/* Check if it needs to be deactivated */
-	if (priv->eee_enabled) {
-		netdev_dbg(priv->dev, "disable EEE\n");
-		priv->eee_sw_timer_en = false;
-		del_timer_sync(&priv->eee_ctrl_timer);
-		stmmac_reset_eee_mode(priv, priv->hw);
-		stmmac_set_eee_timer(priv, priv->hw, 0, STMMAC_DEFAULT_TWT_LS);
-		if (priv->hw->xpcs)
-			xpcs_config_eee(priv->hw->xpcs,
-					priv->plat->mult_fact_100ns, false);
-	}
 	priv->eee_enabled = false;
+
+	netdev_dbg(priv->dev, "disable EEE\n");
+	priv->eee_sw_timer_en = false;
+	del_timer_sync(&priv->eee_ctrl_timer);
+	stmmac_reset_eee_mode(priv, priv->hw);
+	stmmac_set_eee_timer(priv, priv->hw, 0, STMMAC_DEFAULT_TWT_LS);
+	if (priv->hw->xpcs)
+		xpcs_config_eee(priv->hw->xpcs, priv->plat->mult_fact_100ns,
+				false);
+
 	mutex_unlock(&priv->lock);
 }
 
@@ -1071,13 +1070,13 @@ static int stmmac_mac_enable_tx_lpi(struct phylink_config *config, u32 timer,
 
 	mutex_lock(&priv->lock);
 
-	if (!priv->eee_enabled) {
-		stmmac_set_eee_timer(priv, priv->hw, STMMAC_DEFAULT_LIT_LS,
-				     STMMAC_DEFAULT_TWT_LS);
-		if (priv->hw->xpcs)
-			xpcs_config_eee(priv->hw->xpcs,
-					priv->plat->mult_fact_100ns, true);
-	}
+	priv->eee_enabled = true;
+
+	stmmac_set_eee_timer(priv, priv->hw, STMMAC_DEFAULT_LIT_LS,
+			     STMMAC_DEFAULT_TWT_LS);
+	if (priv->hw->xpcs)
+		xpcs_config_eee(priv->hw->xpcs, priv->plat->mult_fact_100ns,
+				true);
 
 	if (priv->plat->has_gmac4 && priv->tx_lpi_timer <= STMMAC_ET_MAX) {
 		/* Use hardware LPI mode */
@@ -1092,8 +1091,6 @@ static int stmmac_mac_enable_tx_lpi(struct phylink_config *config, u32 timer,
 		stmmac_restart_sw_lpi_timer(priv);
 	}
 
-	priv->eee_enabled = true;
-
 	mutex_unlock(&priv->lock);
 	netdev_dbg(priv->dev, "Energy-Efficient Ethernet initialized\n");
 
-- 
2.30.2