Re: [PATCH] PM / OPP: Fix NULL pointer dereference crash when disabling OPPs

Rafael J. Wysocki
2016-02-11T21:16:30Z

On Thu, Feb 11, 2016 at 12:34 PM, Viresh Kumar <viresh.kumar@linaro.org> wrote:
> On 11-02-16, 11:25, Jon Hunter wrote:
>> Commit 7d34d56ef334 ("PM / OPP: Disable OPPs that aren't supported by
>> the regulator") disables OPPs that are not supported by the regulator.
>> This is causes a crash on Tegra124 Jetson TK1 when using the DFLL clock
>> source for the CPU. The DFLL manages the voltage itself and so there is
>> no regulator specified for the OPPs and so we get a crash when we try to
>> dereference the regulator pointer. Fix this by checking to see if the
>> regulator IS_ERR_OR_NULL before dereferencing it.
>>
>> Fixes: 7d34d56ef334 ("PM / OPP: Disable OPPs that aren't supported by the
>> regulator")
>>
>> Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
>> ---
>> drivers/base/power/opp/core.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> Sorry about that :(
>
> Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

Applied, thanks!

Rafael