linux-kernel - [PATCH net] net: qcom/emac: add missed clk_disable_unprepare in error path of emac_clks_phase1

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Message-ID: <20200810025705.28756-1-wanghai38@huawei.com>
Date:   Mon, 10 Aug 2020 10:57:05 +0800
From:   Wang Hai <wanghai38@...wei.com>
To:     <timur@...nel.org>, <davem@...emloft.net>, <kuba@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>
Subject: [PATCH net] net: qcom/emac: add missed clk_disable_unprepare in error path of emac_clks_phase1_init

Fix the missing clk_disable_unprepare() before return
from emac_clks_phase1_init() in the error handling case.

Fixes: b9b17debc69d ("net: emac: emac gigabit ethernet controller driver")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Wang Hai <wanghai38@...wei.com>
Acked-by: Timur Tabi <timur@...nel.org>
---
 drivers/net/ethernet/qualcomm/emac/emac.c | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/qualcomm/emac/emac.c b/drivers/net/ethernet/qualcomm/emac/emac.c
index 20b1b43a0e39..1166b98d8bb2 100644
--- a/drivers/net/ethernet/qualcomm/emac/emac.c
+++ b/drivers/net/ethernet/qualcomm/emac/emac.c
@@ -474,13 +474,24 @@ static int emac_clks_phase1_init(struct platform_device *pdev,
 
 	ret = clk_prepare_enable(adpt->clk[EMAC_CLK_CFG_AHB]);
 	if (ret)
-		return ret;
+		goto disable_clk_axi;
 
 	ret = clk_set_rate(adpt->clk[EMAC_CLK_HIGH_SPEED], 19200000);
 	if (ret)
-		return ret;
+		goto disable_clk_cfg_ahb;
+
+	ret = clk_prepare_enable(adpt->clk[EMAC_CLK_HIGH_SPEED]);
+	if (ret)
+		goto disable_clk_cfg_ahb;
 
-	return clk_prepare_enable(adpt->clk[EMAC_CLK_HIGH_SPEED]);
+	return 0;
+
+disable_clk_cfg_ahb:
+	clk_disable_unprepare(adpt->clk[EMAC_CLK_CFG_AHB]);
+disable_clk_axi:
+	clk_disable_unprepare(adpt->clk[EMAC_CLK_AXI]);
+
+	return ret;
 }
 
 /* Enable clocks; needs emac_clks_phase1_init to be called before */
-- 
2.17.1