linux-kernel - [RESEND PATCH v2] clk: imx: scu: Use pm_runtime_resume_and_get to fix pm_runtime_get

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220425011117.25093-1-linmq006@gmail.com>
Date:   Mon, 25 Apr 2022 09:11:17 +0800
From:   Miaoqian Lin <linmq006@...il.com>
To:     Abel Vesa <abel.vesa@....com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Dong Aisheng <aisheng.dong@....com>, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     linmq006@...il.com
Subject: [RESEND PATCH v2] clk: imx: scu: Use pm_runtime_resume_and_get to fix pm_runtime_get_sync() usage

If the device is already in a runtime PM enabled state
pm_runtime_get_sync() will return 1.

Also, we need to call pm_runtime_put_noidle() when pm_runtime_get_sync()
fails, so use pm_runtime_resume_and_get() instead. this function
will handle this.

Fixes: 78edeb080330 ("clk: imx: scu: add runtime pm support")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
changes in v2:
- change pm_runtime_get_sync to pm_runtime_resume_and_get
- current check works fine for pm_runtime_resume_and_get() so stay the
same.
Link: https://lore.kernel.org/all/20220412065719.17735-1-linmq006@gmail.com/
---
 drivers/clk/imx/clk-scu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/imx/clk-scu.c b/drivers/clk/imx/clk-scu.c
index 083da31dc3ea..2044e62980e3 100644
--- a/drivers/clk/imx/clk-scu.c
+++ b/drivers/clk/imx/clk-scu.c
@@ -528,7 +528,7 @@ static int imx_clk_scu_probe(struct platform_device *pdev)
 		pm_runtime_use_autosuspend(&pdev->dev);
 		pm_runtime_enable(dev);
 
-		ret = pm_runtime_get_sync(dev);
+		ret = pm_runtime_resume_and_get(dev);
 		if (ret) {
 			pm_genpd_remove_device(dev);
 			pm_runtime_disable(dev);
-- 
2.17.1