netdev - [PATCH net 2/3] net: ethernet: mtk_eth_wed: add missing put_device() in mtk_wed_add

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Date:   Mon, 17 Oct 2022 11:51:55 +0800
From:   Yang Yingliang <yangyingliang@...wei.com>
To:     <linux-mediatek@...ts.infradead.org>, <netdev@...r.kernel.org>
CC:     <nbd@....name>, <davem@...emloft.net>
Subject: [PATCH net 2/3] net: ethernet: mtk_eth_wed: add missing put_device() in mtk_wed_add_hw()

After calling get_device() in mtk_wed_add_hw(), in error path, put_device()
needs be called.

Fixes: 804775dfc288 ("net: ethernet: mtk_eth_soc: add support for Wireless Ethernet Dispatch (WED)")
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
---
 drivers/net/ethernet/mediatek/mtk_wed.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_wed.c b/drivers/net/ethernet/mediatek/mtk_wed.c
index 099b6e0df619..09bbd05bd83c 100644
--- a/drivers/net/ethernet/mediatek/mtk_wed.c
+++ b/drivers/net/ethernet/mediatek/mtk_wed.c
@@ -1077,11 +1077,11 @@ void mtk_wed_add_hw(struct device_node *np, struct mtk_eth *eth,
 	get_device(&pdev->dev);
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
-		return;
+		goto err_put_device;
 
 	regs = syscon_regmap_lookup_by_phandle(np, NULL);
 	if (IS_ERR(regs))
-		return;
+		goto err_put_device;
 
 	rcu_assign_pointer(mtk_soc_wed_ops, &wed_ops);
 
@@ -1124,8 +1124,14 @@ void mtk_wed_add_hw(struct device_node *np, struct mtk_eth *eth,
 
 	hw_list[index] = hw;
 
+	mutex_unlock(&hw_lock);
+
+	return;
+
 unlock:
 	mutex_unlock(&hw_lock);
+err_put_device:
+	put_device(&pdev->dev);
 }
 
 void mtk_wed_exit(void)
-- 
2.25.1