From 84cb7ff35fcf7c0b552f553a3f2db9c3e92fc707 Mon Sep 17 00:00:00 2001 From: Viresh Kumar Date: Wed, 14 Jun 2023 15:57:43 +0530 Subject: 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 Reviewed-by: Ulf Hansson Reviewed-by: Bjorn Andersson Tested-by: Bjorn Andersson --- drivers/opp/core.c | 18 ++++++++++++++++-- drivers/opp/debugfs.c | 4 +++- drivers/opp/of.c | 6 ++++++ 3 files changed, 25 insertions(+), 3 deletions(-) (limited to 'drivers/opp') 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; diff --git a/drivers/opp/debugfs.c b/drivers/opp/debugfs.c index 2c7fb683441e..0cc21e2b42ff 100644 --- a/drivers/opp/debugfs.c +++ b/drivers/opp/debugfs.c @@ -152,11 +152,13 @@ void opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table) debugfs_create_bool("dynamic", S_IRUGO, d, &opp->dynamic); debugfs_create_bool("turbo", S_IRUGO, d, &opp->turbo); debugfs_create_bool("suspend", S_IRUGO, d, &opp->suspend); - debugfs_create_u32("performance_state", S_IRUGO, d, &opp->pstate); debugfs_create_u32("level", S_IRUGO, d, &opp->level); debugfs_create_ulong("clock_latency_ns", S_IRUGO, d, &opp->clock_latency_ns); + if (opp_table->is_genpd) + debugfs_create_u32("performance_state", S_IRUGO, d, &opp->pstate); + opp->of_name = of_node_full_name(opp->np); debugfs_create_str("of_name", S_IRUGO, d, (char **)&opp->of_name); diff --git a/drivers/opp/of.c b/drivers/opp/of.c index 943c7fb7402b..e23ce6e78eb6 100644 --- a/drivers/opp/of.c +++ b/drivers/opp/of.c @@ -1392,6 +1392,12 @@ int of_get_required_opp_performance_state(struct device_node *np, int index) goto put_required_np; } + /* The OPP tables must belong to a genpd */ + if (unlikely(!opp_table->is_genpd)) { + pr_err("%s: Performance state is only valid for genpds.\n", __func__); + goto put_required_np; + } + opp = _find_opp_of_np(opp_table, required_np); if (opp) { pstate = opp->pstate; -- cgit v1.2.3