[PATCH 5.4 191/348] net: ftgmac100: add missing error return code in ftgmac100_probe()

From: Greg Kroah-Hartman
Date: Mon Jul 12 2021 - 02:24:54 EST


From: Yang Yingliang <yangyingliang@xxxxxxxxxx>

[ Upstream commit 52af13a41489d7bbc1932d17583eff6e5fffc820 ]

The variables will be free on path err_phy_connect, it should
return error code, or it will cause double free when calling
ftgmac100_remove().

Fixes: bd466c3fb5a4 ("net/faraday: Support NCSI mode")
Fixes: 39bfab8844a0 ("net: ftgmac100: Add support for DT phy-handle property")
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/ethernet/faraday/ftgmac100.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c
index 4050f81f788c..2c06cdcd3e75 100644
--- a/drivers/net/ethernet/faraday/ftgmac100.c
+++ b/drivers/net/ethernet/faraday/ftgmac100.c
@@ -1821,14 +1821,17 @@ static int ftgmac100_probe(struct platform_device *pdev)
if (np && of_get_property(np, "use-ncsi", NULL)) {
if (!IS_ENABLED(CONFIG_NET_NCSI)) {
dev_err(&pdev->dev, "NCSI stack not enabled\n");
+ err = -EINVAL;
goto err_ncsi_dev;
}

dev_info(&pdev->dev, "Using NCSI interface\n");
priv->use_ncsi = true;
priv->ndev = ncsi_register_dev(netdev, ftgmac100_ncsi_handler);
- if (!priv->ndev)
+ if (!priv->ndev) {
+ err = -EINVAL;
goto err_ncsi_dev;
+ }
} else if (np && of_get_property(np, "phy-handle", NULL)) {
struct phy_device *phy;

@@ -1836,6 +1839,7 @@ static int ftgmac100_probe(struct platform_device *pdev)
&ftgmac100_adjust_link);
if (!phy) {
dev_err(&pdev->dev, "Failed to connect to phy\n");
+ err = -EINVAL;
goto err_setup_mdio;
}

--
2.30.2