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SubjectRe: [PATCH V2] cpufreq: Always remove sysfs cpuX/cpufreq link on ->remove_dev()
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On Sat, 2015-11-21 at 09:06 +0530, Viresh Kumar wrote:
> Subsys interface's ->remove_dev() is called when the cpufreq driver
> is
> unregistering or the CPU is getting physically removed. We keep
> removing
> the cpuX/cpufreq link for all CPUs except the last one, which is a
> mistake as all CPUs contain a link now.
>
> Because of this, one CPU from each policy will still contain a link
> (to
> an already removed policyX directory), after the cpufreq driver is
> unregistered.
>
> Fix that by removing the link first and then only see if the policy
> is
> required to be freed. That will make sure that no links are left out.
>
> Fixes: 96bdda61f58b ("cpufreq: create cpu/cpufreq/policyX
> directories")
> Reported-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com

Tested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com
> >
> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
> ---
> [v2] Drop the unnecessary 'return', sorry about that :(
>
> drivers/cpufreq/cpufreq.c | 7 ++-----
> 1 file changed, 2 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
> index 7c48e7316d91..a83c995a62df 100644
> --- a/drivers/cpufreq/cpufreq.c
> +++ b/drivers/cpufreq/cpufreq.c
> @@ -1401,13 +1401,10 @@ static void cpufreq_remove_dev(struct device
> *dev, struct subsys_interface *sif)
> }
>
> cpumask_clear_cpu(cpu, policy->real_cpus);
> + remove_cpu_dev_symlink(policy, cpu);
>
> - if (cpumask_empty(policy->real_cpus)) {
> + if (cpumask_empty(policy->real_cpus))
> cpufreq_policy_free(policy, true);
> - return;
> - }
> -
> - remove_cpu_dev_symlink(policy, cpu);
> }
>
> static void handle_update(struct work_struct *work)


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