linux-kernel - [PATCH 5.8 64/99] PM / devfreq: tegra30: Disable clock on error in probe

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Date:   Tue, 29 Sep 2020 13:01:47 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Dmitry Osipenko <digetx@...il.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.8 64/99] PM / devfreq: tegra30: Disable clock on error in probe

From: Dan Carpenter <dan.carpenter@...cle.com>

[ Upstream commit 6bf560766a8ef5afe4faa3244220cf5b3a934549 ]

This error path needs to call clk_disable_unprepare().

Fixes: 7296443b900e ("PM / devfreq: tegra30: Handle possible round-rate error")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Reviewed-by: Dmitry Osipenko <digetx@...il.com>
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/devfreq/tegra30-devfreq.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c
index e94a27804c209..dedd39de73675 100644
--- a/drivers/devfreq/tegra30-devfreq.c
+++ b/drivers/devfreq/tegra30-devfreq.c
@@ -836,7 +836,8 @@ static int tegra_devfreq_probe(struct platform_device *pdev)
 	rate = clk_round_rate(tegra->emc_clock, ULONG_MAX);
 	if (rate < 0) {
 		dev_err(&pdev->dev, "Failed to round clock rate: %ld\n", rate);
-		return rate;
+		err = rate;
+		goto disable_clk;
 	}
 
 	tegra->max_freq = rate / KHZ;
@@ -897,6 +898,7 @@ static int tegra_devfreq_probe(struct platform_device *pdev)
 	dev_pm_opp_remove_all_dynamic(&pdev->dev);
 
 	reset_control_reset(tegra->reset);
+disable_clk:
 	clk_disable_unprepare(tegra->clock);
 
 	return err;
-- 
2.25.1