linux-kernel - [PATCH v4 8/9] media: i2c: ov5645: Make sure to call PM functions

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]

Date:   Mon, 31 Oct 2022 23:22:01 +0000
From:   Prabhakar <prabhakar.csengg@...il.com>
To:     Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.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>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Hans Verkuil <hverkuil@...all.nl>
Cc:     Shawn Tu <shawnx.tu@...el.com>, Jacopo Mondi <jacopo@...ndi.org>,
        linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-renesas-soc@...r.kernel.org,
        Prabhakar <prabhakar.csengg@...il.com>,
        Biju Das <biju.das.jz@...renesas.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH v4 8/9] media: i2c: ov5645: Make sure to call PM functions

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

Make sure we call the PM functions while s_stream(0) even in case of
errors in the code flow.

v4l2-core takes care of warning the user so no need to add a warning
message in the driver.

Suggested-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
---
v3->v4
* Fixed comments pointed by Marco

v2->v3
* Now propagating the first error code in case of failure.

v1->v2
* New patch
---
 drivers/media/i2c/ov5645.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/media/i2c/ov5645.c b/drivers/media/i2c/ov5645.c
index 6897f542737a..0a889283da36 100644
--- a/drivers/media/i2c/ov5645.c
+++ b/drivers/media/i2c/ov5645.c
@@ -998,15 +998,12 @@ static int ov5645_s_stream(struct v4l2_subdev *subdev, int enable)
 	} else {
 		ret = ov5645_write_reg(ov5645, OV5645_IO_MIPI_CTRL00, 0x40);
 		if (ret < 0)
-			return ret;
+			goto stream_off_rpm_put;
 
 		ret = ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
 				       OV5645_SYSTEM_CTRL0_STOP);
-		if (ret < 0)
-			return ret;
 
-		pm_runtime_mark_last_busy(ov5645->dev);
-		pm_runtime_put_autosuspend(ov5645->dev);
+		goto stream_off_rpm_put;
 	}
 
 	return 0;
@@ -1014,6 +1011,11 @@ static int ov5645_s_stream(struct v4l2_subdev *subdev, int enable)
 err_rpm_put:
 	pm_runtime_put_sync(ov5645->dev);
 	return ret;
+
+stream_off_rpm_put:
+	pm_runtime_mark_last_busy(ov5645->dev);
+	pm_runtime_put_autosuspend(ov5645->dev);
+	return ret;
 }
 
 static const struct v4l2_subdev_video_ops ov5645_video_ops = {
-- 
2.25.1