From: Heiko Stuebner <heiko@sntech.de>
Date: Thu, 15 Sep 2016 22:14:38 +0000 (+0200)
Subject: soc: rockchip: power-domain: use pm_genpd_remove in error cleanup
X-Git-Tag: v4.14-rc1~1851^2~20^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=79d12b7a7f227ed51dd86b16a7536b391e46f7b0;p=platform%2Fkernel%2Flinux-rpi.git

soc: rockchip: power-domain: use pm_genpd_remove in error cleanup

The newly introduced pm_genpd_remove reverts the initialization done
by pm_genpd_init and is necessary in the error path of the rockchip
power-domain driver.

Without it the driver will in the error case cleanup the devm-allocated
structures including the elements referenced in the gpd_list thus making
deactivation of unused domains (and probably later genpd accesses as
well) fail by accessing invalid pointers.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
---

diff --git a/drivers/soc/rockchip/pm_domains.c b/drivers/soc/rockchip/pm_domains.c
index 988bfd708706..d36a7351af9d 100644
--- a/drivers/soc/rockchip/pm_domains.c
+++ b/drivers/soc/rockchip/pm_domains.c
@@ -479,7 +479,16 @@ err_out:
 
 static void rockchip_pm_remove_one_domain(struct rockchip_pm_domain *pd)
 {
-	int i;
+	int i, ret;
+
+	/*
+	 * We're in the error cleanup already, so we only complain,
+	 * but won't emit another error on top of the original one.
+	 */
+	ret = pm_genpd_remove(&pd->genpd);
+	if (ret < 0)
+		dev_err(pd->pmu->dev, "failed to remove domain '%s' : %d - state may be inconsistent\n",
+			pd->genpd.name, ret);
 
 	for (i = 0; i < pd->num_clks; i++) {
 		clk_unprepare(pd->clks[i]);