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PM / devfreq: rockchip_dmc: no lock dmcfreq->lock on rockchip_dmcfreq_target

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It is not necessary to lock/unlock dmcfreq->lock on rockchip_dmcfreq_target.
update_devfreq call target callback with devfreq->lock.
So use rockchip_dmcfreq lock to serializes access to video_info_list only.

Change-Id: I9abd5fa1dfc37740d3fac9983775028dc14b64b5
Signed-off-by: Tao Huang <huangtao@rock-chips.com>
This commit is contained in:
Tao Huang
2018-05-16 16:39:22 +08:00
parent 14456a86ef
commit e1bcb0e4eb
1 changed files with 1 additions and 4 deletions
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5
drivers/devfreq/rockchip_dmc.c
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@@ -760,7 +760,7 @@ struct rockchip_dmcfreq {
struct devfreq_simple_ondemand_data ondemand_data;
struct clk *dmc_clk;
struct devfreq_event_dev *edev;
struct mutex lock; /* scaling frequency lock */
struct mutex lock; /* serializes access to video_info_list */
struct dram_timing *timing;
struct regulator *vdd_center;
struct notifier_block system_status_nb;
@@ -966,8 +966,6 @@ static int rockchip_dmcfreq_target(struct device *dev, unsigned long *freq,
dmcfreq->volt = regulator_get_voltage(dmcfreq->vdd_center);
}
mutex_lock(&dmcfreq->lock);
/*
* We need to prevent cpu hotplug from happening while a dmc freq rate
* change is happening.
@@ -1064,7 +1062,6 @@ out:
cpufreq_cpu_put(policy);
cpufreq:
put_online_cpus();
mutex_unlock(&dmcfreq->lock);
return err;
}