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| author | Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> | 2023-07-21 15:46:33 +0300 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2023-07-24 11:01:17 +0300 |
| commit | 7ddd8deb1c3c0363a7e14fafb5df26e2089a69a5 (patch) | |
| tree | fa737024ea531c153c3a34299d015e4cd7bd0d31 /drivers/opp | |
| parent | 746de8255076c9924ffa51baad9822adddccb94e (diff) | |
| download | linux-7ddd8deb1c3c0363a7e14fafb5df26e2089a69a5.tar.xz | |
OPP: Fix potential null ptr dereference in dev_pm_opp_get_required_pstate()
"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@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers/opp')
| -rw-r--r-- | drivers/opp/core.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/opp/core.c b/drivers/opp/core.c index 0ad8664d2423..991c2e894b1a 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -226,20 +226,18 @@ 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; } |