Re: [PATCH v2 1/1] PM / OPP: Fix get sharing cpus when hotplug is used

[Viresh Kumar <viresh.kumar@linaro.org>]

On 21-07-17, 14:13, Waldemar Rymarkiewicz wrote:
> We fail dev_pm_opp_of_get_sharing_cpus() when possible cpu device does not
> exist. This can happen on platforms where not all possible CPUs are
> available at start up ie. hotplugged out. Cpu device is not registered in
> the system so we are not able to check struct device to set the sharing
> CPUs bitmask properly.
> 
> Example (real use case):
> 2 physical MIPS cores, 4 VPE, cpu0/2 run Linux and cpu1/3 are not available
> for Linux at boot up. cpufreq-dt driver + opp v2 fail to register opp_table
> due to the fact there is no struct device for cpu1 (remains offline at
> bootup).
> 
> To solve the bug, stop using device struct to check device_node. Instead
> get cpu device_node directly from device tree with of_get_cpu_node().
> 
> Signed-off-by: Waldemar Rymarkiewicz <waldemarx.rymarkiewicz@intel.com>
> ---
>  drivers/base/power/opp/of.c | 28 +++++++++++++++++-----------
>  1 file changed, 17 insertions(+), 11 deletions(-)

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

-- 
viresh