netdev - [PATCH net] net: pch_gbe: fix pci device refcount leak while module exiting

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Message-ID: <20221117135148.301014-1-yangyingliang@huawei.com>
Date:   Thu, 17 Nov 2022 21:51:48 +0800
From:   Yang Yingliang <yangyingliang@...wei.com>
To:     <netdev@...r.kernel.org>
CC:     <davem@...emloft.net>, <tshimizu818@...il.com>
Subject: [PATCH net] net: pch_gbe: fix pci device refcount leak while module exiting

As comment of pci_get_domain_bus_and_slot() says, it returns
a pci device with refcount increment, when finish using it,
the caller must decrement the reference count by calling
pci_dev_put().

In pch_gbe_probe(), pci_get_domain_bus_and_slot() is called,
so in error path in probe() and remove() function, pci_dev_put()
should be called to avoid refcount leak. Compile tested only.

Fixes: 1a0bdadb4e36 ("net/pch_gbe: supports eg20t ptp clock")
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
---
 drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c
index 3f2c30184752..d4affdcf5984 100644
--- a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c
+++ b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c
@@ -2459,6 +2459,7 @@ static void pch_gbe_remove(struct pci_dev *pdev)
 	unregister_netdev(netdev);
 
 	pch_gbe_phy_hw_reset(&adapter->hw);
+	pci_dev_put(adapter->ptp_pdev);
 
 	free_netdev(netdev);
 }
@@ -2533,7 +2534,7 @@ static int pch_gbe_probe(struct pci_dev *pdev,
 	/* setup the private structure */
 	ret = pch_gbe_sw_init(adapter);
 	if (ret)
-		goto err_free_netdev;
+		goto err_put_dev;
 
 	/* Initialize PHY */
 	ret = pch_gbe_init_phy(adapter);
@@ -2591,6 +2592,8 @@ static int pch_gbe_probe(struct pci_dev *pdev,
 
 err_free_adapter:
 	pch_gbe_phy_hw_reset(&adapter->hw);
+err_put_dev:
+	pci_dev_put(adapter->ptp_pdev);
 err_free_netdev:
 	free_netdev(netdev);
 	return ret;
-- 
2.25.1