linux-kernel - [PATCH 2/3] cpufreq: imx6q: fix error handling

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Date:   Tue,  3 Mar 2020 10:14:49 +0800
From:   peng.fan@....com
To:     viresh.kumar@...aro.org, shawnguo@...nel.org,
        s.hauer@...gutronix.de
Cc:     kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        Anson.Huang@....com, linux-pm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        robh+dt@...nel.org, devicetree@...r.kernel.org,
        Peng Fan <peng.fan@....com>
Subject: [PATCH 2/3] cpufreq: imx6q: fix error handling

From: Peng Fan <peng.fan@....com>

When speed checking failed, direclty jumping to put_node label
is not correct. Need jump to out_free_opp to avoid resources leak.

Fixes: 2733fb0d0699 ("cpufreq: imx6q: read OCOTP through nvmem for imx6ul/imx6ull")
Signed-off-by: Peng Fan <peng.fan@....com>
---
 drivers/cpufreq/imx6q-cpufreq.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c
index 648a09a1778a..b634a73d1f8f 100644
--- a/drivers/cpufreq/imx6q-cpufreq.c
+++ b/drivers/cpufreq/imx6q-cpufreq.c
@@ -378,23 +378,24 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev)
 		goto put_reg;
 	}
 
+	/* Because we have added the OPPs here, we must free them */
+	free_opp = true;
+
 	if (of_machine_is_compatible("fsl,imx6ul") ||
 	    of_machine_is_compatible("fsl,imx6ull")) {
 		ret = imx6ul_opp_check_speed_grading(cpu_dev);
 		if (ret) {
 			if (ret == -EPROBE_DEFER)
-				goto put_node;
+				goto out_free_opp;
 
 			dev_err(cpu_dev, "failed to read ocotp: %d\n",
 				ret);
-			goto put_node;
+			goto out_free_opp;
 		}
 	} else {
 		imx6q_opp_check_speed_grading(cpu_dev);
 	}
 
-	/* Because we have added the OPPs here, we must free them */
-	free_opp = true;
 	num = dev_pm_opp_get_opp_count(cpu_dev);
 	if (num < 0) {
 		ret = num;
-- 
2.16.4