Re: [PATCH v2] cpufreq: OMAP: Fix resource leak in probe error path and remove

Viresh Kumar
2026-01-06T04:51:39Z

On 05-01-26, 21:12, Haotian Zhang wrote:
> The current omap_cpufreq_probe() uses regulator_get() to obtain the MPU
> regulator but does not release it in omap_cpufreq_remove() or when
> cpufreq_register_driver() fails.
>
> Add the missing regulator_put() in the remove function and in the
> error handling path of the probe function to prevent resource leaks.
> Also ensure the mpu_reg pointer is set to NULL after release to avoid
> dangling pointers.
>
> Fixes: 53dfe8a884e6 ("cpufreq: OMAP: scale voltage along with frequency")
> Suggested-by: Andreas Kemnade <andreas@kemnade.info>
> Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn>
>
> ---
> Changes in v2:
> - Revert to using regulator_get() instead of devm_regulator_get()
> to ensure immediate release of unusable regulators and
> safer handling of the global mpu_reg variable.
> - Add explicit regulator_put() in omap_cpufreq_remove().
> - Add error handling for cpufreq_register_driver() in probe.
> ---
> drivers/cpufreq/omap-cpufreq.c | 15 ++++++++++++++-
> 1 file changed, 14 insertions(+), 1 deletion(-)

I have left some feedback on the previous version. Lets continue the discussion
there.

--
viresh