Adding a new clause to this if/else I noticed the existing usage of pm_genpd_add_subdomain() wasn't capturing and returning the result code.
pm_genpd_add_subdomain() returns an int and can fail. Capture that result code and throw it up the call stack if something goes wrong.
Fixes: 1b771839de05 ("clk: qcom: gdsc: enable optional power domain support") Cc: stable@vger.kernel.org Signed-off-by: Bryan O'Donoghue bryan.odonoghue@linaro.org --- drivers/clk/qcom/gdsc.c | 40 +++++++++++++++++++++++++++------------- 1 file changed, 27 insertions(+), 13 deletions(-)
diff --git a/drivers/clk/qcom/gdsc.c b/drivers/clk/qcom/gdsc.c index bc1b1e37bf4222017c172b77603f8dedba961ed5..fdedf6dfe7b90c074b200353fc0c2b897863c79f 100644 --- a/drivers/clk/qcom/gdsc.c +++ b/drivers/clk/qcom/gdsc.c @@ -506,6 +506,23 @@ static int gdsc_init(struct gdsc *sc) return ret; }
+static void gdsc_pm_subdomain_remove(struct gdsc_desc *desc, size_t num) +{ + struct device *dev = desc->dev; + struct gdsc **scs = desc->scs; + int i; + + /* Remove subdomains */ + for (i = num - 1; i >= 0; i--) { + if (!scs[i]) + continue; + if (scs[i]->parent) + pm_genpd_remove_subdomain(scs[i]->parent, &scs[i]->pd); + else if (!IS_ERR_OR_NULL(dev->pm_domain)) + pm_genpd_remove_subdomain(pd_to_genpd(dev->pm_domain), &scs[i]->pd); + } +} + int gdsc_register(struct gdsc_desc *desc, struct reset_controller_dev *rcdev, struct regmap *regmap) { @@ -555,30 +572,27 @@ int gdsc_register(struct gdsc_desc *desc, if (!scs[i]) continue; if (scs[i]->parent) - pm_genpd_add_subdomain(scs[i]->parent, &scs[i]->pd); + ret = pm_genpd_add_subdomain(scs[i]->parent, &scs[i]->pd); else if (!IS_ERR_OR_NULL(dev->pm_domain)) - pm_genpd_add_subdomain(pd_to_genpd(dev->pm_domain), &scs[i]->pd); + ret = pm_genpd_add_subdomain(pd_to_genpd(dev->pm_domain), &scs[i]->pd); + if (ret) + goto err_pm_subdomain_remove; }
return of_genpd_add_provider_onecell(dev->of_node, data); + +err_pm_subdomain_remove: + gdsc_pm_subdomain_remove(desc, i); + + return ret; }
void gdsc_unregister(struct gdsc_desc *desc) { - int i; struct device *dev = desc->dev; - struct gdsc **scs = desc->scs; size_t num = desc->num;
- /* Remove subdomains */ - for (i = num - 1; i >= 0; i--) { - if (!scs[i]) - continue; - if (scs[i]->parent) - pm_genpd_remove_subdomain(scs[i]->parent, &scs[i]->pd); - else if (!IS_ERR_OR_NULL(dev->pm_domain)) - pm_genpd_remove_subdomain(pd_to_genpd(dev->pm_domain), &scs[i]->pd); - } + gdsc_pm_subdomain_remove(desc, num); of_genpd_del_provider(dev->of_node); }