[PATCH v3 02/12] opp: Filter out OPPs based on availability of a required-OPP

Dmitry Osipenko
2021-01-18T00:56:51Z

A required OPP may not be available, and thus, all OPPs which are using
this required OPP should be unavailable too.

Tested-by: Peter Geis <pgwipeout@gmail.com>
Tested-by: Nicolas Chauvet <kwizart@gmail.com>
Tested-by: Matt Merhar <mattmerhar@protonmail.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/opp/core.c | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 48618ff3e99e..7b4d07279638 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -1522,6 +1522,7 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
struct opp_table *opp_table, bool rate_not_available)
{
struct list_head *head;
+ unsigned int i;
int ret;

mutex_lock(&opp_table->lock);
@@ -1547,6 +1548,16 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
__func__, new_opp->rate);
}

+ for (i = 0; i < opp_table->required_opp_count; i++) {
+ if (new_opp->required_opps[i]->available)
+ continue;
+
+ new_opp->available = false;
+ dev_warn(dev, "%s: OPP not supported by required OPP %pOF (%lu)\n",
+ __func__, new_opp->required_opps[i]->np, new_opp->rate);
+ break;
+ }
+
return 0;
}

--
2.29.2