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authorViresh Kumar <viresh.kumar@linaro.org>2020-10-22 12:26:08 +0530
committerViresh Kumar <viresh.kumar@linaro.org>2020-10-27 13:21:03 +0530
commite0df59de670b48a923246fae1f972317b84b2764 (patch)
tree8a449e6404c277d65197e0e4f042b1ac688c13f6 /drivers/opp
parent47efcbcb340cca5d3b3d515964f09e1fec599a29 (diff)
opp: Reduce the size of critical section in _opp_table_kref_release()
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 <robdclark@gmail.com> Reported-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers/opp')
-rw-r--r--drivers/opp/core.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 4ac4e7ce6b8b..0e0a5269dc82 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -1181,6 +1181,10 @@ static void _opp_table_kref_release(struct kref *kref)
struct opp_device *opp_dev, *temp;
int i;
+ /* 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 */
@@ -1208,10 +1212,7 @@ 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)