linux-kernel - [PATCH v5 10/25] media: coda: use pm_runtime_resume_and

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Message-Id: <6b1404005196a38948fb4f6c30715bc6bedafef2.1620314616.git.mchehab+huawei@kernel.org>
Date:   Thu,  6 May 2021 17:25:48 +0200
From:   Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To:     unlisted-recipients:; (no To-header on input)
Cc:     linuxarm@...wei.com, mauro.chehab@...wei.com,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org
Subject: [PATCH v5 10/25] media: coda: use pm_runtime_resume_and_get()

Commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter")
added pm_runtime_resume_and_get() in order to automatically handle
dev->power.usage_count decrement on errors.

Use the new API, in order to cleanup the error check logic.

While here, as noted by Phillip, the labels at the coda_open()
function are currently named after what operation failed,
instead of what they do in response. So, change the name of
the error label that it is called when clk_enable fails,
in order to be consistent.

Reviewed-by: Philipp Zabel <p.zabel@...gutronix.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
---
 drivers/media/platform/coda/coda-common.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/media/platform/coda/coda-common.c b/drivers/media/platform/coda/coda-common.c
index bd666c858fa1..2017de85713e 100644
--- a/drivers/media/platform/coda/coda-common.c
+++ b/drivers/media/platform/coda/coda-common.c
@@ -2660,7 +2660,7 @@ static int coda_open(struct file *file)
 	ctx->use_vdoa = false;
 
 	/* Power up and upload firmware if necessary */
-	ret = pm_runtime_get_sync(dev->dev);
+	ret = pm_runtime_resume_and_get(dev->dev);
 	if (ret < 0) {
 		v4l2_err(&dev->v4l2_dev, "failed to power up: %d\n", ret);
 		goto err_pm_get;
@@ -2668,7 +2668,7 @@ static int coda_open(struct file *file)
 
 	ret = clk_prepare_enable(dev->clk_per);
 	if (ret)
-		goto err_pm_get;
+		goto err_clk_enable;
 
 	ret = clk_prepare_enable(dev->clk_ahb);
 	if (ret)
@@ -2707,8 +2707,9 @@ static int coda_open(struct file *file)
 	clk_disable_unprepare(dev->clk_ahb);
 err_clk_ahb:
 	clk_disable_unprepare(dev->clk_per);
+err_clk_enable:
+	pm_runtime_put_sync(dev->dev);
 err_pm_get:
-	pm_runtime_put_sync(dev->dev);
 	v4l2_fh_del(&ctx->fh);
 	v4l2_fh_exit(&ctx->fh);
 err_coda_name_init:
-- 
2.30.2