From 9fe99de01440d9ede74d447ac76e9c445d8daae9 Mon Sep 17 00:00:00 2001 From: Yang Yingliang Date: Sat, 29 May 2021 11:04:39 +0800 Subject: [PATCH] net: dsa: qca8k: add missing check return value in qca8k_phylink_mac_config() Now we can check qca8k_read() return value correctly, so if it fails, we need return directly. Signed-off-by: Yang Yingliang Signed-off-by: Jakub Kicinski --- drivers/net/dsa/qca8k.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) --- a/drivers/net/dsa/qca8k.c +++ b/drivers/net/dsa/qca8k.c @@ -1128,6 +1128,7 @@ qca8k_phylink_mac_config(struct dsa_swit { struct qca8k_priv *priv = ds->priv; u32 reg, val; + int ret; switch (port) { case 0: /* 1st CPU port */ @@ -1198,7 +1199,9 @@ qca8k_phylink_mac_config(struct dsa_swit qca8k_write(priv, reg, QCA8K_PORT_PAD_SGMII_EN); /* Enable/disable SerDes auto-negotiation as necessary */ - qca8k_read(priv, QCA8K_REG_PWS, &val); + ret = qca8k_read(priv, QCA8K_REG_PWS, &val); + if (ret) + return; if (phylink_autoneg_inband(mode)) val &= ~QCA8K_PWS_SERDES_AEN_DIS; else @@ -1206,7 +1209,9 @@ qca8k_phylink_mac_config(struct dsa_swit qca8k_write(priv, QCA8K_REG_PWS, val); /* Configure the SGMII parameters */ - qca8k_read(priv, QCA8K_REG_SGMII_CTRL, &val); + ret = qca8k_read(priv, QCA8K_REG_SGMII_CTRL, &val); + if (ret) + return; val |= QCA8K_SGMII_EN_PLL | QCA8K_SGMII_EN_RX | QCA8K_SGMII_EN_TX | QCA8K_SGMII_EN_SD;