linux-kernel - [PATCH v3 8/9] media: i2c: ov5645: Don't return early on failures for s

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Date:   Wed, 26 Oct 2022 14:06:57 +0100
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 v3 8/9] media: i2c: ov5645: Don't return early on failures for s_stream(0)

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

Make sure we dont stop the code flow in case of errors while stopping
the stream and return the error code of the first error case if any.

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

v1->v2
* New patch
---
 drivers/media/i2c/ov5645.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/media/i2c/ov5645.c b/drivers/media/i2c/ov5645.c
index eea3067ddc8b..5702a55607fc 100644
--- a/drivers/media/i2c/ov5645.c
+++ b/drivers/media/i2c/ov5645.c
@@ -996,17 +996,22 @@ static int ov5645_s_stream(struct v4l2_subdev *subdev, int enable)
 		if (ret < 0)
 			goto err_rpm_put;
 	} else {
+		int stream_off_ret = 0;
+
 		ret = ov5645_write_reg(ov5645, OV5645_IO_MIPI_CTRL00, 0x40);
 		if (ret < 0)
-			return ret;
+			stream_off_ret = ret;
 
 		ret = ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
 				       OV5645_SYSTEM_CTRL0_STOP);
-		if (ret < 0)
-			return ret;
+		if (ret < 0 && !stream_off_ret)
+			stream_off_ret = ret;
 
 		pm_runtime_mark_last_busy(ov5645->dev);
 		pm_runtime_put_autosuspend(ov5645->dev);
+
+		if (stream_off_ret)
+			return stream_off_ret;
 	}
 
 	return 0;
-- 
2.25.1