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From: trix@redhat.com
To: nbd@nbd.name, john@phrozen.org, sean.wang@mediatek.com,
	Mark-MC.Lee@mediatek.com, davem@davemloft.net, kuba@kernel.org,
	matthias.bgg@gmail.com, linux@armlinux.org.uk, nathan@kernel.org,
	ndesaulniers@google.com, opensource@vdorst.com
Cc: netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
	llvm@lists.linux.dev, Tom Rix <trix@redhat.com>
Subject: [PATCH] net: ethernet: mtk_eth_soc: fix error checking in mtk_mac_config()
Date: Sat,  8 Jan 2022 07:50:03 -0800	[thread overview]
Message-ID: <20220108155003.3991055-1-trix@redhat.com> (raw)

From: Tom Rix <trix@redhat.com>

Clang static analysis reports this problem
mtk_eth_soc.c:394:7: warning: Branch condition evaluates
  to a garbage value
                if (err)
                    ^~~

err is not initialized and only conditionally set.
Check err consistently with the rest of mtk_mac_config(),
after even possible setting.

Fixes: 7e538372694b ("net: ethernet: mediatek: Re-add support SGMII")
Signed-off-by: Tom Rix <trix@redhat.com>
---
 drivers/net/ethernet/mediatek/mtk_eth_soc.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index b67b4323cff08..a27e548488584 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -385,14 +385,16 @@ static void mtk_mac_config(struct phylink_config *config, unsigned int mode,
 		       0 : mac->id;
 
 		/* Setup SGMIISYS with the determined property */
-		if (state->interface != PHY_INTERFACE_MODE_SGMII)
+		if (state->interface != PHY_INTERFACE_MODE_SGMII) {
 			err = mtk_sgmii_setup_mode_force(eth->sgmii, sid,
 							 state);
-		else if (phylink_autoneg_inband(mode))
+			if (err)
+				goto init_err;
+		} else if (phylink_autoneg_inband(mode)) {
 			err = mtk_sgmii_setup_mode_an(eth->sgmii, sid);
-
-		if (err)
-			goto init_err;
+			if (err)
+				goto init_err;
+		}
 
 		regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0,
 				   SYSCFG0_SGMII_MASK, val);
-- 
2.26.3


WARNING: multiple messages have this Message-ID (diff)
From: trix@redhat.com
To: nbd@nbd.name, john@phrozen.org, sean.wang@mediatek.com,
	Mark-MC.Lee@mediatek.com, davem@davemloft.net, kuba@kernel.org,
	matthias.bgg@gmail.com, linux@armlinux.org.uk, nathan@kernel.org,
	ndesaulniers@google.com, opensource@vdorst.com
Cc: netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
	llvm@lists.linux.dev, Tom Rix <trix@redhat.com>
Subject: [PATCH] net: ethernet: mtk_eth_soc: fix error checking in mtk_mac_config()
Date: Sat,  8 Jan 2022 07:50:03 -0800	[thread overview]
Message-ID: <20220108155003.3991055-1-trix@redhat.com> (raw)

From: Tom Rix <trix@redhat.com>

Clang static analysis reports this problem
mtk_eth_soc.c:394:7: warning: Branch condition evaluates
  to a garbage value
                if (err)
                    ^~~

err is not initialized and only conditionally set.
Check err consistently with the rest of mtk_mac_config(),
after even possible setting.

Fixes: 7e538372694b ("net: ethernet: mediatek: Re-add support SGMII")
Signed-off-by: Tom Rix <trix@redhat.com>
---
 drivers/net/ethernet/mediatek/mtk_eth_soc.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index b67b4323cff08..a27e548488584 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -385,14 +385,16 @@ static void mtk_mac_config(struct phylink_config *config, unsigned int mode,
 		       0 : mac->id;
 
 		/* Setup SGMIISYS with the determined property */
-		if (state->interface != PHY_INTERFACE_MODE_SGMII)
+		if (state->interface != PHY_INTERFACE_MODE_SGMII) {
 			err = mtk_sgmii_setup_mode_force(eth->sgmii, sid,
 							 state);
-		else if (phylink_autoneg_inband(mode))
+			if (err)
+				goto init_err;
+		} else if (phylink_autoneg_inband(mode)) {
 			err = mtk_sgmii_setup_mode_an(eth->sgmii, sid);
-
-		if (err)
-			goto init_err;
+			if (err)
+				goto init_err;
+		}
 
 		regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0,
 				   SYSCFG0_SGMII_MASK, val);
-- 
2.26.3


_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

WARNING: multiple messages have this Message-ID (diff)
From: trix@redhat.com
To: nbd@nbd.name, john@phrozen.org, sean.wang@mediatek.com,
	Mark-MC.Lee@mediatek.com, davem@davemloft.net, kuba@kernel.org,
	matthias.bgg@gmail.com, linux@armlinux.org.uk, nathan@kernel.org,
	ndesaulniers@google.com, opensource@vdorst.com
Cc: netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
	llvm@lists.linux.dev, Tom Rix <trix@redhat.com>
Subject: [PATCH] net: ethernet: mtk_eth_soc: fix error checking in mtk_mac_config()
Date: Sat,  8 Jan 2022 07:50:03 -0800	[thread overview]
Message-ID: <20220108155003.3991055-1-trix@redhat.com> (raw)

From: Tom Rix <trix@redhat.com>

Clang static analysis reports this problem
mtk_eth_soc.c:394:7: warning: Branch condition evaluates
  to a garbage value
                if (err)
                    ^~~

err is not initialized and only conditionally set.
Check err consistently with the rest of mtk_mac_config(),
after even possible setting.

Fixes: 7e538372694b ("net: ethernet: mediatek: Re-add support SGMII")
Signed-off-by: Tom Rix <trix@redhat.com>
---
 drivers/net/ethernet/mediatek/mtk_eth_soc.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index b67b4323cff08..a27e548488584 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -385,14 +385,16 @@ static void mtk_mac_config(struct phylink_config *config, unsigned int mode,
 		       0 : mac->id;
 
 		/* Setup SGMIISYS with the determined property */
-		if (state->interface != PHY_INTERFACE_MODE_SGMII)
+		if (state->interface != PHY_INTERFACE_MODE_SGMII) {
 			err = mtk_sgmii_setup_mode_force(eth->sgmii, sid,
 							 state);
-		else if (phylink_autoneg_inband(mode))
+			if (err)
+				goto init_err;
+		} else if (phylink_autoneg_inband(mode)) {
 			err = mtk_sgmii_setup_mode_an(eth->sgmii, sid);
-
-		if (err)
-			goto init_err;
+			if (err)
+				goto init_err;
+		}
 
 		regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0,
 				   SYSCFG0_SGMII_MASK, val);
-- 
2.26.3


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

             reply	other threads:[~2022-01-08 15:50 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-08 15:50 trix [this message]
2022-01-08 15:50 ` [PATCH] net: ethernet: mtk_eth_soc: fix error checking in mtk_mac_config() trix
2022-01-08 15:50 ` trix
2022-01-10  0:43 ` Jakub Kicinski
2022-01-10  0:43   ` Jakub Kicinski
2022-01-10  0:43   ` Jakub Kicinski
2022-01-10 13:43   ` Tom Rix
2022-01-10 13:43     ` Tom Rix
2022-01-10 13:43     ` Tom Rix

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