linux-kernel - [PATCH v3 18/79] media: delta-v4l2: fix pm_runtime_get

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Message-Id: <364e0a87973ec4676f1aa16b3373a0c95f0366f0.1619519080.git.mchehab+huawei@kernel.org>
Date:   Tue, 27 Apr 2021 12:26:08 +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>,
        Hugues Fruchet <hugues.fruchet@...com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org
Subject: [PATCH v3 18/79] media: delta-v4l2: fix pm_runtime_get_sync() usage count

The pm_runtime_get_sync() internally increments the
dev->power.usage_count without decrementing it, even on errors.
Replace it by the new pm_runtime_resume_and_get(), introduced by:
commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter")
in order to properly decrement the usage counter and avoid memory
leaks.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
---
 drivers/media/platform/sti/delta/delta-v4l2.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/sti/delta/delta-v4l2.c b/drivers/media/platform/sti/delta/delta-v4l2.c
index c691b3d81549..9928b7c46a41 100644
--- a/drivers/media/platform/sti/delta/delta-v4l2.c
+++ b/drivers/media/platform/sti/delta/delta-v4l2.c
@@ -1277,9 +1277,9 @@ int delta_get_sync(struct delta_ctx *ctx)
 	int ret = 0;
 
 	/* enable the hardware */
-	ret = pm_runtime_get_sync(delta->dev);
+	ret = pm_runtime_resume_and_get(delta->dev);
 	if (ret < 0) {
-		dev_err(delta->dev, "%s pm_runtime_get_sync failed (%d)\n",
+		dev_err(delta->dev, "%s pm_runtime_resume_and_get failed (%d)\n",
 			__func__, ret);
 		return ret;
 	}
-- 
2.30.2