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opp: Reduce the size of critical section in _opp_table_kref_release()

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[ Upstream commit e0df59de670b48a923246fae1f972317b84b2764 ]

There is a lot of stuff here which can be done outside of the big
opp_table_lock, do that. This helps avoiding few circular dependency
lockdeps around debugfs and interconnects.

Reported-by: Rob Clark <[email protected]>
Reported-by: Dmitry Osipenko <[email protected]>
Signed-off-by: Viresh Kumar <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
This commit is contained in:
Viresh Kumar 2020-10-22 12:26:08 +05:30 • committed by Greg Kroah-Hartman
commit e604903541
1 changed files with 4 additions and 3 deletions
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7
drivers/opp/core.c
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@ -1046,6 +1046,10 @@ static void _opp_table_kref_release(struct kref *kref)
struct opp_table *opp_table = container_of(kref, struct opp_table, kref);
struct opp_device *opp_dev, *temp;
/* Drop the lock as soon as we can */
list_del(&opp_table->node);
mutex_unlock(&opp_table_lock);
_of_clear_opp_table(opp_table);
/* Release clk */
@ -1067,10 +1071,7 @@ static void _opp_table_kref_release(struct kref *kref)
mutex_destroy(&opp_table->genpd_virt_dev_lock);
mutex_destroy(&opp_table->lock);
list_del(&opp_table->node);
kfree(opp_table);
mutex_unlock(&opp_table_lock);
}
void dev_pm_opp_put_opp_table(struct opp_table *opp_table)