6.5-stable review patch. If anyone has any objections, please let me know.
------------------
From: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
[ Upstream commit 7ddd8deb1c3c0363a7e14fafb5df26e2089a69a5 ]
"opp" pointer is dereferenced before the IS_ERR_OR_NULL() check. Fix it by
removing the dereference to cache opp_table and dereference it directly
where opp_table is used.
This fixes the following smatch warning:
drivers/opp/core.c:232 dev_pm_opp_get_required_pstate() warn: variable
dereferenced before IS_ERR check 'opp' (see line 230)
Fixes: 84cb7ff35fcf ("OPP: pstate is only valid for genpd OPP tables")
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/opp/core.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 3f46e499d615f..98633ccd170a3 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -227,20 +227,18 @@ 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_table->required_opp_count) {
+ index >= opp->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_table))
+ if (lazy_linking_pending(opp->opp_table))
return 0;
/* The required OPP table must belong to a genpd */
- if (unlikely(!opp_table->required_opp_tables[index]->is_genpd)) {
+ if (unlikely(!opp->opp_table->required_opp_tables[index]->is_genpd)) {
pr_err("%s: Performance state is only valid for genpds.\n", __func__);
return 0;
}
--
2.40.1
