net: stmmac: clarify priv->pause and pause module parameter

priv->pause corresponds with "pause_time" in the 802.3 specification,
and is also called "pause_time" in the various MAC backends. For
consistency, use the same name in the core stmmac code.

Clarify the units of the "pause" module parameter which sets up this
struct member to indicate that it's in units of the pause_quanta
defined by 802.3, which is 512 bit times.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Mateusz Polchlopek <mateusz.polchlopek@intel.com>
Link: https://patch.msgid.link/E1tkKmD-004ObA-9K@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/stmicro/stmmac/stmmac.h

@@ -283,7 +283,7 @@ struct stmmac_priv {
 
 	int speed;
 	unsigned int flow_ctrl;
-	unsigned int pause;
+	unsigned int pause_time;
 	struct mii_bus *mii;
 
 	struct phylink_config phylink_config;

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

@@ -94,7 +94,7 @@ MODULE_PARM_DESC(flow_ctrl, "Flow control ability [on/off]");
 
 static int pause = PAUSE_TIME;
 module_param(pause, int, 0644);
-MODULE_PARM_DESC(pause, "Flow Control Pause Time");
+MODULE_PARM_DESC(pause, "Flow Control Pause Time (units of 512 bit times)");
 
 #define TC_DEFAULT 64
 static int tc = TC_DEFAULT;
@@ -865,7 +865,7 @@ static void stmmac_mac_flow_ctrl(struct stmmac_priv *priv, u32 duplex)
 	u32 tx_cnt = priv->plat->tx_queues_to_use;
 
 	stmmac_flow_ctrl(priv, priv->hw, duplex, priv->flow_ctrl,
-			priv->pause, tx_cnt);
+			 priv->pause_time, tx_cnt);
 }
 
 static unsigned long stmmac_mac_get_caps(struct phylink_config *config,
@@ -7404,7 +7404,7 @@ int stmmac_dvr_probe(struct device *device,
 		return -ENOMEM;
 
 	stmmac_set_ethtool_ops(ndev);
-	priv->pause = pause;
+	priv->pause_time = pause;
 	priv->plat = plat_dat;
 	priv->ioaddr = res->addr;
 	priv->dev->base_addr = (unsigned long)res->addr;