Thread (6 messages) 6 messages, 2 authors, 2021-05-28

Re: [PATCH -next 1/2] net: dsa: qca8k: check return value of read functions correctly

From: Jakub Kicinski <kuba@kernel.org>
Date: 2021-05-28 21:15:16
Also in: lkml

On Fri, 28 May 2021 16:22:39 +0800 Yang Yingliang wrote:
Current return type of qca8k_mii_read32() and qca8k_read() are
unsigned, it can't be negative, so the return value check is
unuseful. For check the return value correctly, change return
type of the read functions and add a output parameter to store
the read value.

Signed-off-by: Yang Yingliang <redacted>
quoted hunk ↗ jump to hunk
@@ -1141,6 +1128,7 @@ qca8k_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
 {
 	struct qca8k_priv *priv = ds->priv;
 	u32 reg, val;
+	int ret;
 
 	switch (port) {
 	case 0: /* 1st CPU port */
@@ -1211,7 +1199,7 @@ qca8k_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
 		qca8k_write(priv, reg, QCA8K_PORT_PAD_SGMII_EN);
 
 		/* Enable/disable SerDes auto-negotiation as necessary */
-		val = qca8k_read(priv, QCA8K_REG_PWS);
+		ret = qca8k_read(priv, QCA8K_REG_PWS, &val);
 		if (phylink_autoneg_inband(mode))
 			val &= ~QCA8K_PWS_SERDES_AEN_DIS;
 		else
@@ -1219,7 +1207,7 @@ qca8k_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
 		qca8k_write(priv, QCA8K_REG_PWS, val);
 
 		/* Configure the SGMII parameters */
-		val = qca8k_read(priv, QCA8K_REG_SGMII_CTRL);
+		ret = qca8k_read(priv, QCA8K_REG_SGMII_CTRL, &val);
 
 		val |= QCA8K_SGMII_EN_PLL | QCA8K_SGMII_EN_RX |
 			QCA8K_SGMII_EN_TX | QCA8K_SGMII_EN_SD;
drivers/net/dsa/qca8k.c: In function ‘qca8k_phylink_mac_config’:
drivers/net/dsa/qca8k.c:1131:6: warning: variable ‘ret’ set but not used [-Wunused-but-set-variable]
 1131 |  int ret;
      |      ^~~
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