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    SubjectRe: [PATCH 08/11] PM / devfreq: check get_dev_status in devfreq_update_stats
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    Date
    On 21. 3. 9. 오후 9:58, Dong Aisheng wrote:
    > Check .get_dev_status() in devfreq_update_stats in case it's abused
    > when a device does not provide it.
    >
    > Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
    > ---
    > drivers/devfreq/governor.h | 3 +++
    > 1 file changed, 3 insertions(+)
    >
    > diff --git a/drivers/devfreq/governor.h b/drivers/devfreq/governor.h
    > index 31af6d072a10..67a6dbdd5d23 100644
    > --- a/drivers/devfreq/governor.h
    > +++ b/drivers/devfreq/governor.h
    > @@ -89,6 +89,9 @@ int devfreq_update_target(struct devfreq *devfreq, unsigned long freq);
    >
    > static inline int devfreq_update_stats(struct devfreq *df)
    > {
    > + if (!df->profile->get_dev_status)
    > + return -EINVAL;
    > +
    > return df->profile->get_dev_status(df->dev.parent, &df->last_status);
    > }
    > #endif /* _GOVERNOR_H */
    >

    Applied it. Thanks.

    --
    Best Regards,
    Samsung Electronics
    Chanwoo Choi

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