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cpufreq: davinci: Fix clk use after free

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The remove function first frees the clks and only then calls
cpufreq_unregister_driver(). If one of the cpufreq callbacks is called
just before cpufreq_unregister_driver() is run, the freed clks might be
used.

Fixes: 6601b8030d ("davinci: add generic CPUFreq driver for DaVinci")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Uwe Kleine-König 2023-02-08 10:26:54 +01:00 committed by Rafael J. Wysocki
parent 7cca9a9851
commit 5d8f384a9b
1 changed files with 2 additions and 2 deletions
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4
drivers/cpufreq/davinci-cpufreq.c
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@ -133,13 +133,13 @@ static int __init davinci_cpufreq_probe(struct platform_device *pdev)
static int __exit davinci_cpufreq_remove(struct platform_device *pdev)
{
cpufreq_unregister_driver(&davinci_driver);
clk_put(cpufreq.armclk);
if (cpufreq.asyncclk)
clk_put(cpufreq.asyncclk);
cpufreq_unregister_driver(&davinci_driver);
return 0;
}