netdev - [PATCH net-next v3 04/18] net: stmmac: use unsigned int for eee

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Message-Id: <E1tVCRj-007Y3H-Hm@rmk-PC.armlinux.org.uk>
Date: Tue, 07 Jan 2025 16:28:47 +0000
From: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To: Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>
Cc: Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Jose Abreu <joabreu@...opsys.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-stm32@...md-mailman.stormreply.com,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	netdev@...r.kernel.org,
	Paolo Abeni <pabeni@...hat.com>
Subject: [PATCH net-next v3 04/18] net: stmmac: use unsigned int for eee_timer

Since eee_timer is used to initialise priv->tx_lpi_timer, this also
should be unsigned to avoid a negative number being interpreted as a
very large positive number. Note that this makes the check for negative
numbers passed in as a module parameter redundant, and passing a
negative number will now produce a large delay rather than the
default. Since the default is used without an argument, passing a
negative number would be quite obscure. However, if users do, then
this will need to be revisited.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index dbe5635398b3..96393e6feda0 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -111,8 +111,8 @@ static const u32 default_msg_level = (NETIF_MSG_DRV | NETIF_MSG_PROBE |
 				      NETIF_MSG_IFDOWN | NETIF_MSG_TIMER);
 
 #define STMMAC_DEFAULT_LPI_TIMER	1000
-static int eee_timer = STMMAC_DEFAULT_LPI_TIMER;
-module_param(eee_timer, int, 0644);
+static unsigned int eee_timer = STMMAC_DEFAULT_LPI_TIMER;
+module_param(eee_timer, uint, 0644);
 MODULE_PARM_DESC(eee_timer, "LPI tx expiration time in msec");
 #define STMMAC_LPI_T(x) (jiffies + usecs_to_jiffies(x))
 
@@ -194,8 +194,6 @@ static void stmmac_verify_args(void)
 		flow_ctrl = FLOW_OFF;
 	if (unlikely((pause < 0) || (pause > 0xffff)))
 		pause = PAUSE_TIME;
-	if (eee_timer < 0)
-		eee_timer = STMMAC_DEFAULT_LPI_TIMER;
 }
 
 static void __stmmac_disable_all_queues(struct stmmac_priv *priv)
-- 
2.30.2