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Merge "clk: qcom: Fix race condition when unvoting regulators in sync_state"

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qctecmdr 2020-10-13 20:34:00 -07:00 • committed by Gerrit - the friendly Code Review server
commit 48d7c9d79e
1 changed files with 8 additions and 0 deletions
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8
drivers/clk/qcom/vdd-class.c
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@ -9,6 +9,8 @@
#include "vdd-class.h"
#include "clk-regmap.h"
static DEFINE_MUTEX(vdd_lock);
/*
* Aggregate the vdd_class level votes and call regulator framework functions
* to enforce the highest vote.
@ -87,12 +89,15 @@ int clk_vote_vdd_level(struct clk_vdd_class_data *vdd_data, int level)
if (level >= vdd_class->num_levels)
return -EINVAL;
mutex_lock(&vdd_lock);
vdd_class->level_votes[level]++;
ret = clk_aggregate_vdd(vdd_class);
if (ret)
vdd_class->level_votes[level]--;
mutex_unlock(&vdd_lock);
return ret;
}
EXPORT_SYMBOL(clk_vote_vdd_level);
@ -122,12 +127,15 @@ int clk_unvote_vdd_level(struct clk_vdd_class_data *vdd_data, int level)
return -EINVAL;
}
mutex_lock(&vdd_lock);
vdd_class->level_votes[level]--;
ret = clk_aggregate_vdd(vdd_class);
if (ret)
vdd_class->level_votes[level]++;
mutex_unlock(&vdd_lock);
return ret;
}
EXPORT_SYMBOL(clk_unvote_vdd_level);