linux-kernel - [PATCH net] net: gemini: Fix missing clk_disable_unprepare() in error path of gemini_ethernet_port

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Date:   Thu, 30 Jul 2020 15:30:00 +0800
From:   Wang Hai <wanghai38@...wei.com>
To:     <ulli.kroll@...glemail.com>, <linus.walleij@...aro.org>,
        <davem@...emloft.net>, <kuba@...nel.org>, <mirq-linux@...e.qmqm.pl>
CC:     <linux-arm-kernel@...ts.infradead.org>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH net] net: gemini: Fix missing clk_disable_unprepare() in error path of gemini_ethernet_port_probe()

Fix the missing clk_disable_unprepare() before return
from gemini_ethernet_port_probe() in the error handling case.

Fixes: 4d5ae32f5e1e ("net: ethernet: Add a driver for Gemini gigabit ethernet")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Wang Hai <wanghai38@...wei.com>
---
 drivers/net/ethernet/cortina/gemini.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/cortina/gemini.c b/drivers/net/ethernet/cortina/gemini.c
index 8d13ea370db1..66e67b24a887 100644
--- a/drivers/net/ethernet/cortina/gemini.c
+++ b/drivers/net/ethernet/cortina/gemini.c
@@ -2446,6 +2446,7 @@ static int gemini_ethernet_port_probe(struct platform_device *pdev)
 	port->reset = devm_reset_control_get_exclusive(dev, NULL);
 	if (IS_ERR(port->reset)) {
 		dev_err(dev, "no reset\n");
+		clk_disable_unprepare(port->pclk);
 		return PTR_ERR(port->reset);
 	}
 	reset_control_reset(port->reset);
@@ -2501,8 +2502,10 @@ static int gemini_ethernet_port_probe(struct platform_device *pdev)
 					IRQF_SHARED,
 					port_names[port->id],
 					port);
-	if (ret)
+	if (ret) {
+		clk_disable_unprepare(port->pclk);
 		return ret;
+	}
 
 	ret = register_netdev(netdev);
 	if (!ret) {
-- 
2.17.1