Messages in this thread | | | Date | Fri, 02 Aug 2013 12:24:01 +0530 | From | "Srivatsa S. Bhat" <> | Subject | Re: [PATCH] cpufreq: Avoid double kobject_put() for the same kobject in error code path |
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On 08/02/2013 03:01 AM, Rafael J. Wysocki wrote: > From: Rafael J. Wysocki <rafael.j.wysocki@intel.com> > > The only case triggering a jump to the err_out_unregister label in > __cpufreq_add_dev() is when cpufreq_add_dev_interface() fails. > However, if cpufreq_add_dev_interface() fails, it calls kobject_put() > for the policy kobject in its error code path and since that causes > the kobject's refcount to become 0, the additional kobject_put() for > the same kobject under err_out_unregister and the > wait_for_completion() following it are pointless, so drop them. > > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Regards, Srivatsa S. Bhat
> --- > drivers/cpufreq/cpufreq.c | 3 --- > 1 file changed, 3 deletions(-) > > Index: linux-pm/drivers/cpufreq/cpufreq.c > =================================================================== > --- linux-pm.orig/drivers/cpufreq/cpufreq.c > +++ linux-pm/drivers/cpufreq/cpufreq.c > @@ -1109,9 +1109,6 @@ err_out_unregister: > } > write_unlock_irqrestore(&cpufreq_driver_lock, flags); > > - kobject_put(&policy->kobj); > - wait_for_completion(&policy->kobj_unregister); > - > err_set_policy_cpu: > per_cpu(cpufreq_policy_cpu, cpu) = -1; > cpufreq_policy_free(policy); >
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