diff options
| author | Viresh Kumar <viresh.kumar@linaro.org> | 2023-06-14 13:27:43 +0300 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2023-06-19 07:20:02 +0300 |
| commit | 84cb7ff35fcf7c0b552f553a3f2db9c3e92fc707 (patch) | |
| tree | 491fdd3db54ade951a5664d75f007ab8b98c8639 /drivers/opp/core.c | |
| parent | 04bd2eafee153b9cc4b411d4a24d32b1ec2ce41c (diff) | |
| download | linux-84cb7ff35fcf7c0b552f553a3f2db9c3e92fc707.tar.xz | |
OPP: pstate is only valid for genpd OPP tables
It is not very clear right now that the `pstate` field is only valid for
genpd OPP tables and not consumer tables. And there is no checking for
the same at various places.
Add checks in place to verify that and make it clear to the reader.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Tested-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Diffstat (limited to 'drivers/opp/core.c')
| -rw-r--r-- | drivers/opp/core.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/drivers/opp/core.c b/drivers/opp/core.c index 7290168ec806..4c82ee20ceb7 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -227,16 +227,24 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_get_level); unsigned int dev_pm_opp_get_required_pstate(struct dev_pm_opp *opp, unsigned int index) { + struct opp_table *opp_table = opp->opp_table; + if (IS_ERR_OR_NULL(opp) || !opp->available || - index >= opp->opp_table->required_opp_count) { + index >= opp_table->required_opp_count) { pr_err("%s: Invalid parameters\n", __func__); return 0; } /* required-opps not fully initialized yet */ - if (lazy_linking_pending(opp->opp_table)) + if (lazy_linking_pending(opp_table)) return 0; + /* The required OPP table must belong to a genpd */ + if (unlikely(!opp_table->required_opp_tables[index]->is_genpd)) { + pr_err("%s: Performance state is only valid for genpds.\n", __func__); + return 0; + } + return opp->required_opps[index]->pstate; } EXPORT_SYMBOL_GPL(dev_pm_opp_get_required_pstate); @@ -2696,6 +2704,12 @@ int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, if (!src_table || !src_table->required_opp_count) return pstate; + /* Both OPP tables must belong to genpds */ + if (unlikely(!src_table->is_genpd || !dst_table->is_genpd)) { + pr_err("%s: Performance state is only valid for genpds.\n", __func__); + return -EINVAL; + } + /* required-opps not fully initialized yet */ if (lazy_linking_pending(src_table)) return -EBUSY; |