linux-kernel - [PATCH v2 7/9] media: i2c: imx334: Enable runtime PM before sub-device registration

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

Message-Id: <20250329054335.19931-8-tarang.raval@siliconsignals.io>
Date: Sat, 29 Mar 2025 11:13:29 +0530
From: Tarang Raval <tarang.raval@...iconsignals.io>
To: sakari.ailus@...ux.intel.com,
	kieran.bingham@...asonboard.com
Cc: Shravan.Chippa@...rochip.com,
	Tarang Raval <tarang.raval@...iconsignals.io>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Hans Verkuil <hverkuil@...all.nl>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Umang Jain <umang.jain@...asonboard.com>,
	Julien Massot <julien.massot@...labora.com>,
	Zhi Mao <zhi.mao@...iatek.com>,
	Benjamin Mugnier <benjamin.mugnier@...s.st.com>,
	Luis Garcia <git@...gi311.com>,
	linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 7/9] media: i2c: imx334: Enable runtime PM before sub-device registration

Runtime PM is fully initialized before calling
v4l2_async_register_subdev_sensor(). Moving the runtime PM initialization
earlier prevents potential access to an uninitialized or powered-down device.

Signed-off-by: Tarang Raval <tarang.raval@...iconsignals.io>
---
 drivers/media/i2c/imx334.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/media/i2c/imx334.c b/drivers/media/i2c/imx334.c
index ad28f12c29b3..169c3c4ca9eb 100644
--- a/drivers/media/i2c/imx334.c
+++ b/drivers/media/i2c/imx334.c
@@ -1287,6 +1287,9 @@ static int imx334_probe(struct i2c_client *client)
 		goto error_handler_free;
 	}
 
+	pm_runtime_set_active(imx334->dev);
+	pm_runtime_enable(imx334->dev);
+
 	ret = v4l2_async_register_subdev_sensor(&imx334->sd);
 	if (ret < 0) {
 		dev_err(imx334->dev,
@@ -1294,13 +1297,13 @@ static int imx334_probe(struct i2c_client *client)
 		goto error_media_entity;
 	}
 
-	pm_runtime_set_active(imx334->dev);
-	pm_runtime_enable(imx334->dev);
 	pm_runtime_idle(imx334->dev);
 
 	return 0;
 
 error_media_entity:
+	pm_runtime_disable(imx334->dev);
+	pm_runtime_set_suspended(imx334->dev);
 	media_entity_cleanup(&imx334->sd.entity);
 error_handler_free:
 	v4l2_ctrl_handler_free(imx334->sd.ctrl_handler);
-- 
2.34.1