diff options
| author | Viresh Kumar <viresh.kumar@linaro.org> | 2023-11-16 15:59:35 +0530 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2023-11-28 16:03:25 +0530 |
| commit | 925141432fa4d8325b7156e88e53d740b12d0b0e (patch) | |
| tree | 16c7c6d5262f018ab15819f5f215fd3aef9867e5 /drivers/opp/of.c | |
| parent | e37440e7e2c2760475d60c5556b59c8880a7fd63 (diff) | |
OPP: Don't set OPP recursively for a parent genpd
Like other frameworks (clk, regulator, etc.) genpd core too takes care
of propagation to performance state to parent genpds. The OPP core
shouldn't attempt the same, or it may result in undefined behavior.
Add checks at various places to take care of the same.
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers/opp/of.c')
| -rw-r--r-- | drivers/opp/of.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/opp/of.c b/drivers/opp/of.c index 5a7e294e56b7..f9f0b22bccbb 100644 --- a/drivers/opp/of.c +++ b/drivers/opp/of.c @@ -339,8 +339,11 @@ static int _link_required_opps(struct dev_pm_opp *opp, struct opp_table *opp_tab */ if (required_table->is_genpd && opp_table->required_opp_count == 1 && !opp_table->required_devs[0]) { - if (!WARN_ON(opp->level != OPP_LEVEL_UNSET)) - opp->level = opp->required_opps[0]->level; + /* Genpd core takes care of propagation to parent genpd */ + if (!opp_table->is_genpd) { + if (!WARN_ON(opp->level != OPP_LEVEL_UNSET)) + opp->level = opp->required_opps[0]->level; + } } return 0; |