target/linux/mediatek/patches-5.4/999-2720-net-dsa-phy-coverity-scan.patch

From 98719219a038adac88f2fae9caaecb7e84704d09 Mon Sep 17 00:00:00 2001
From: Sam Shih <sam.shih@mediatek.com>
Date: Fri, 2 Jun 2023 13:06:32 +0800
Subject: [PATCH] [networking][999-2720-net-dsa-phy-coverity-scan.patch]

---
 drivers/net/dsa/mt7530.c     |  4 ++-
 drivers/net/dsa/mt7531_phy.c | 56 +++++++++++++++++++-----------------
 2 files changed, 32 insertions(+), 28 deletions(-)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 290a2e77a..21fa3e300 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -2477,7 +2477,7 @@ static int
 mt7531_cpu_port_config(struct dsa_switch *ds, int port)
 {
 	struct mt7530_priv *priv = ds->priv;
-	phy_interface_t interface;
+	phy_interface_t interface = PHY_INTERFACE_MODE_NA;
 	int speed;
 
 	switch (port) {
@@ -2497,6 +2497,8 @@ mt7531_cpu_port_config(struct dsa_switch *ds, int port)
 		priv->p6_interface = interface;
 		break;
 	};
+	if (interface == PHY_INTERFACE_MODE_NA)
+		dev_err(priv->dev, "invalid interface\n");
 
 	if (interface == PHY_INTERFACE_MODE_2500BASEX)
 		speed = SPEED_2500;
diff --git a/drivers/net/dsa/mt7531_phy.c b/drivers/net/dsa/mt7531_phy.c
index a5c1e7d54..aaa03c678 100644
--- a/drivers/net/dsa/mt7531_phy.c
+++ b/drivers/net/dsa/mt7531_phy.c
@@ -252,7 +252,7 @@ static int ge_cal_rext(struct dsa_switch *ds, u8 phyaddr, u32 delay)
 	u16 dev1e_17a_tmp, dev1e_e0_tmp;
 
 	/* *** Iext/Rext Cal start ************ */
-	all_ana_cal_status = ANACAL_INIT;
+	//all_ana_cal_status = ANACAL_INIT;
 	/* analog calibration enable, Rext calibration enable */
 	/* 1e_db[12]:rg_cal_ckinv, [8]:rg_ana_calen, [4]:rg_rext_calen, [0]:rg_zcalen_a */
 	/* 1e_dc[0]:rg_txvos_calen */
@@ -296,7 +296,7 @@ static int ge_cal_rext(struct dsa_switch *ds, u8 phyaddr, u32 delay)
 			all_ana_cal_status = ANACAL_FINISH;
 			//printk("  GE Rext AnaCal Done! (%d)(0x%x)  \r\n", cnt, rg_zcal_ctrl);
 		} else {
-			dev1e_17a_tmp = tc_phy_read_dev_reg(ds, PHY0, 0x1e, 0x017a);
+			//dev1e_17a_tmp = tc_phy_read_dev_reg(ds, PHY0, 0x1e, 0x017a);
 			dev1e_e0_tmp =	tc_phy_read_dev_reg(ds, PHY0, 0x1e, 0xe0);
 			if ((rg_zcal_ctrl == 0x3F) || (rg_zcal_ctrl == 0x00)) {
 				all_ana_cal_status = ANACAL_SATURATION;  /* need to FT(IC fail?) */
@@ -718,32 +718,34 @@ static int ge_cal_tx_amp(struct dsa_switch *ds, u8 phyaddr, u32 delay)
 				} else if (phyaddr == 1) {
 					if (calibration_pair == ANACAL_PAIR_A)
 						tx_amp_temp = tx_amp_temp - 1;
-					else if(calibration_pair == ANACAL_PAIR_B)
-						tx_amp_temp = tx_amp_temp ;
+					//else if(calibration_pair == ANACAL_PAIR_B)
+					//	tx_amp_temp = tx_amp_temp;
 					else if(calibration_pair == ANACAL_PAIR_C)
 						tx_amp_temp = tx_amp_temp - 1;
 					else if(calibration_pair == ANACAL_PAIR_D)
 						tx_amp_temp = tx_amp_temp - 1;
 				} else if (phyaddr == 2) {
-					if (calibration_pair == ANACAL_PAIR_A)
-						tx_amp_temp = tx_amp_temp;
-					else if(calibration_pair == ANACAL_PAIR_B)
+					//if (calibration_pair == ANACAL_PAIR_A)
+					//	tx_amp_temp = tx_amp_temp;
+					//else if(calibration_pair == ANACAL_PAIR_B)
+					if(calibration_pair == ANACAL_PAIR_B)
 						tx_amp_temp = tx_amp_temp - 1;
-					else if(calibration_pair == ANACAL_PAIR_C)
-						tx_amp_temp = tx_amp_temp;
+					//else if(calibration_pair == ANACAL_PAIR_C)
+					//	tx_amp_temp = tx_amp_temp;
 					else if(calibration_pair == ANACAL_PAIR_D)
 						tx_amp_temp = tx_amp_temp - 1;
-				} else if (phyaddr == 3) {
-					tx_amp_temp = tx_amp_temp;
+				//} else if (phyaddr == 3) {
+				//	tx_amp_temp = tx_amp_temp;
 				} else if (phyaddr == 4) {
-					if (calibration_pair == ANACAL_PAIR_A)
-						tx_amp_temp = tx_amp_temp;
-					else if(calibration_pair == ANACAL_PAIR_B)
+					//if (calibration_pair == ANACAL_PAIR_A)
+					//	tx_amp_temp = tx_amp_temp;
+					//else if(calibration_pair == ANACAL_PAIR_B)
+					if(calibration_pair == ANACAL_PAIR_B)
 						tx_amp_temp = tx_amp_temp - 1;
-					else if(calibration_pair == ANACAL_PAIR_C)
-						tx_amp_temp = tx_amp_temp;
-					else if(calibration_pair == ANACAL_PAIR_D)
-						tx_amp_temp = tx_amp_temp;
+					//else if(calibration_pair == ANACAL_PAIR_C)
+					//	tx_amp_temp = tx_amp_temp;
+					//else if(calibration_pair == ANACAL_PAIR_D)
+					//	tx_amp_temp = tx_amp_temp;
 				}
 				reg_temp = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, tx_amp_reg)&(~0xff00);
 				tc_phy_write_dev_reg(ds, phyaddr, 0x1e, tx_amp_reg_100,(tx_amp_temp|((tx_amp_temp)<<tx_amp_reg_shift)));
@@ -858,7 +860,7 @@ static int ge_cal_tx_amp(struct dsa_switch *ds, u8 phyaddr, u32 delay)
 					reg_backup = 0x0000;
 					reg_backup |= ((tx_amp_temp << 10) | (tx_amp_temp << 0));
 					tc_phy_write_dev_reg(ds, phyaddr, 0x1e, 0x12, reg_backup);
-					reg_backup = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, 0x12);
+					//reg_backup = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, 0x12);
 					//printk("PORT[%d] 1e.012 = %x (OFFSET_1000M_PAIR_A)\n", phyaddr, reg_backup);
 					reg_backup = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, 0x16);
 					reg_tmp = ((reg_backup & 0x3f) >> 0);
@@ -866,7 +868,7 @@ static int ge_cal_tx_amp(struct dsa_switch *ds, u8 phyaddr, u32 delay)
 					reg_backup = (reg_backup & (~0x3f));
 					reg_backup |= (tx_amp_temp << 0);
 					tc_phy_write_dev_reg(ds, phyaddr, 0x1e, 0x16, reg_backup);
-					reg_backup = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, 0x16);
+					//reg_backup = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, 0x16);
 					//printk("PORT[%d] 1e.016 = %x (OFFSET_TESTMODE_1000M_PAIR_A)\n", phyaddr, reg_backup);
 				}
 				else if(calibration_pair == ANACAL_PAIR_B){
@@ -876,7 +878,7 @@ static int ge_cal_tx_amp(struct dsa_switch *ds, u8 phyaddr, u32 delay)
 					reg_backup = 0x0000;
                                        reg_backup |= ((tx_amp_temp << 8) | (tx_amp_temp << 0));
 					tc_phy_write_dev_reg(ds, phyaddr, 0x1e, 0x17, reg_backup);
-					reg_backup = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, 0x17);
+					//reg_backup = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, 0x17);
 					//printk("PORT[%d] 1e.017 = %x (OFFSET_1000M_PAIR_B)\n", phyaddr, reg_backup);
 					reg_backup = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, 0x18);
 					reg_tmp = ((reg_backup & 0x3f) >> 0);
@@ -884,7 +886,7 @@ static int ge_cal_tx_amp(struct dsa_switch *ds, u8 phyaddr, u32 delay)
 					reg_backup = (reg_backup & (~0x3f));
 					reg_backup |= (tx_amp_temp << 0);
 					tc_phy_write_dev_reg(ds, phyaddr, 0x1e, 0x18, reg_backup);
-					reg_backup = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, 0x18);
+					//reg_backup = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, 0x18);
 					//printk("PORT[%d] 1e.018 = %x (OFFSET_TESTMODE_1000M_PAIR_B)\n", phyaddr, reg_backup);
 				}
 				else if(calibration_pair == ANACAL_PAIR_C){
@@ -894,7 +896,7 @@ static int ge_cal_tx_amp(struct dsa_switch *ds, u8 phyaddr, u32 delay)
 					reg_backup = (reg_backup & (~0x3f00));
 					reg_backup |= (tx_amp_temp << 8);
 					tc_phy_write_dev_reg(ds, phyaddr, 0x1e, 0x19, reg_backup);
-					reg_backup = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, 0x19);
+					//reg_backup = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, 0x19);
 					//printk("PORT[%d] 1e.019 = %x (OFFSET_1000M_PAIR_C)\n", phyaddr, reg_backup);
 					reg_backup = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, 0x20);
 					reg_tmp = ((reg_backup & 0x3f) >> 0);
@@ -902,7 +904,7 @@ static int ge_cal_tx_amp(struct dsa_switch *ds, u8 phyaddr, u32 delay)
 					reg_backup = (reg_backup & (~0x3f));
 					reg_backup |= (tx_amp_temp << 0);
 					tc_phy_write_dev_reg(ds, phyaddr, 0x1e, 0x20, reg_backup);
-					reg_backup = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, 0x20);
+					//reg_backup = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, 0x20);
 					//printk("PORT[%d] 1e.020 = %x (OFFSET_TESTMODE_1000M_PAIR_C)\n", phyaddr, reg_backup);
 				}
 				else if(calibration_pair == ANACAL_PAIR_D){
@@ -912,7 +914,7 @@ static int ge_cal_tx_amp(struct dsa_switch *ds, u8 phyaddr, u32 delay)
 					reg_backup = (reg_backup & (~0x3f00));
 					reg_backup |= (tx_amp_temp << 8);
 					tc_phy_write_dev_reg(ds, phyaddr, 0x1e, 0x21, reg_backup);
-					reg_backup = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, 0x21);
+					//reg_backup = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, 0x21);
 					//printk("PORT[%d] 1e.021 = %x (OFFSET_1000M_PAIR_D)\n", phyaddr, reg_backup);
 					reg_backup = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, 0x22);
 					reg_tmp = ((reg_backup & 0x3f) >> 0);
@@ -920,7 +922,7 @@ static int ge_cal_tx_amp(struct dsa_switch *ds, u8 phyaddr, u32 delay)
 					reg_backup = (reg_backup & (~0x3f));
 					reg_backup |= (tx_amp_temp << 0);
 					tc_phy_write_dev_reg(ds, phyaddr, 0x1e, 0x22, reg_backup);
-					reg_backup = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, 0x22);
+					//reg_backup = tc_phy_read_dev_reg(ds,  phyaddr, 0x1e, 0x22);
 					//printk("PORT[%d] 1e.022 = %x (OFFSET_TESTMODE_1000M_PAIR_D)\n", phyaddr, reg_backup);
 				}
 
@@ -1352,7 +1354,7 @@ static void mt7531_eee_setting(struct dsa_switch *ds, u32 port)
 
 int mt7531_phy_setup(struct dsa_switch *ds)
 {
-	int ret;
+	int ret = 0;
 	int i;
 
 	mt7531_phy_setting(ds);
-- 
2.34.1