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Wed, 6 Mar 2019 13:35:24 +0000 From: Aisheng Dong To: "linux-pm@vger.kernel.org" Subject: [PATCH 2/2] PM / Domains: Choose the deepest state to enter if no devices using it Thread-Topic: [PATCH 2/2] PM / Domains: Choose the deepest state to enter if no devices using it Thread-Index: AQHU1CFzg5FXML1TukGlKs0Suxgc6Q== Date: Wed, 6 Mar 2019 13:35:23 +0000 Message-ID: <1551878926-8455-3-git-send-email-aisheng.dong@nxp.com> References: <1551878926-8455-1-git-send-email-aisheng.dong@nxp.com> In-Reply-To: <1551878926-8455-1-git-send-email-aisheng.dong@nxp.com> Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.7.4 x-clientproxiedby: HK2PR04CA0052.apcprd04.prod.outlook.com (2603:1096:202:14::20) To AM0PR04MB4211.eurprd04.prod.outlook.com (2603:10a6:208:5b::30) authentication-results: spf=none (sender IP is ) smtp.mailfrom=aisheng.dong@nxp.com; x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [119.31.174.66] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: bab064f8-8be9-4fd4-983c-08d6a23895c3 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0; 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Signed-off-by: Dong Aisheng --- drivers/base/power/domain.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 847a69e..d3f57c2 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -550,6 +550,10 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on, if (!genpd->gov) genpd->state_idx = 0; + /* Choose the deepest state if no devices using this domain */ + if (!genpd->device_count) + genpd->state_idx = genpd->state_count - 1; + /* * If sd_count > 0 at this point, one of the subdomains hasn't * managed to call genpd_power_on() for the master yet after