linux-kernel - [RFC PATCH 03/12] media: i2c: ov5645: Enable runtime PM after v4l2_async_register

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Message-Id: <20240904210719.52466-4-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Wed,  4 Sep 2024 22:07:10 +0100
From: Prabhakar <prabhakar.csengg@...il.com>
To: Sakari Ailus <sakari.ailus@...ux.intel.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Kieran Bingham <kieran.bingham@...asonboard.com>,
	Tomi Valkeinen <tomi.valkeinen@...asonboard.com>,
	Jacopo Mondi <jacopo.mondi@...asonboard.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	Prabhakar <prabhakar.csengg@...il.com>,
	Biju Das <biju.das.jz@...renesas.com>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [RFC PATCH 03/12] media: i2c: ov5645: Enable runtime PM after v4l2_async_register_subdev()

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

To simplify the probe error path, enable runtime PM after the
v4l2_async_register_subdev() call.

This change ensures that runtime PM is only enabled once the subdevice
registration is successful, avoiding unnecessary cleanup in the error
path.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
---
 drivers/media/i2c/ov5645.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/media/i2c/ov5645.c b/drivers/media/i2c/ov5645.c
index ab3a419df2df..78b86438c798 100644
--- a/drivers/media/i2c/ov5645.c
+++ b/drivers/media/i2c/ov5645.c
@@ -1239,18 +1239,17 @@ static int ov5645_probe(struct i2c_client *client)
 		goto power_down;
 	}
 
-	pm_runtime_set_active(dev);
-	pm_runtime_get_noresume(dev);
-	pm_runtime_enable(dev);
-
 	ov5645_init_state(&ov5645->sd, NULL);
 
 	ret = v4l2_async_register_subdev(&ov5645->sd);
 	if (ret < 0) {
 		dev_err(dev, "could not register v4l2 device\n");
-		goto err_pm_runtime;
+		goto power_down;
 	}
 
+	pm_runtime_set_active(dev);
+	pm_runtime_get_noresume(dev);
+	pm_runtime_enable(dev);
 	pm_runtime_set_autosuspend_delay(dev, 1000);
 	pm_runtime_use_autosuspend(dev);
 	pm_runtime_mark_last_busy(dev);
@@ -1258,9 +1257,6 @@ static int ov5645_probe(struct i2c_client *client)
 
 	return 0;
 
-err_pm_runtime:
-	pm_runtime_disable(dev);
-	pm_runtime_put_noidle(dev);
 power_down:
 	ov5645_set_power_off(dev);
 free_entity:
-- 
2.34.1