linux-kernel - [PATCH 6/9] media: stm32: csi: simplify enable

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Message-ID: <20241217-csi_dcmipp_mp25_enhancements-v1-6-2b432805d17d@foss.st.com>
Date: Tue, 17 Dec 2024 18:39:23 +0100
From: Alain Volmat <alain.volmat@...s.st.com>
To: Hugues Fruchet <hugues.fruchet@...s.st.com>,
        Mauro Carvalho Chehab
	<mchehab@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre
 Torgue <alexandre.torgue@...s.st.com>,
        Hans Verkuil <hverkuil@...all.nl>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>
CC: <linux-media@...r.kernel.org>, <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>, Alain Volmat <alain.volmat@...s.st.com>
Subject: [PATCH 6/9] media: stm32: csi: simplify enable_streams error
 handling

Put all error handling for VC stop and CSI stop together
to avoid duplication of code.

Signed-off-by: Alain Volmat <alain.volmat@...s.st.com>
---
 drivers/media/platform/st/stm32/stm32-csi.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/media/platform/st/stm32/stm32-csi.c b/drivers/media/platform/st/stm32/stm32-csi.c
index 3654f9895dbc..4affbc00b042 100644
--- a/drivers/media/platform/st/stm32/stm32-csi.c
+++ b/drivers/media/platform/st/stm32/stm32-csi.c
@@ -694,19 +694,21 @@ static int stm32_csi_enable_streams(struct v4l2_subdev *sd,
 	ret = stm32_csi_start_vc(csidev, state, 0);
 	if (ret) {
 		dev_err(csidev->dev, "Failed to start VC0\n");
-		stm32_csi_stop(csidev);
-		return ret;
+		goto failed_start_vc;
 	}
 
 	ret = v4l2_subdev_enable_streams(csidev->s_subdev,
 					 csidev->s_subdev_pad_nb, BIT_ULL(0));
-	if (ret) {
-		stm32_csi_stop_vc(csidev, 0);
-		stm32_csi_stop(csidev);
-		return ret;
-	}
+	if (ret)
+		goto failed_enable_streams;
 
 	return 0;
+
+failed_enable_streams:
+	stm32_csi_stop_vc(csidev, 0);
+failed_start_vc:
+	stm32_csi_stop(csidev);
+	return ret;
 }
 
 static int stm32_csi_init_state(struct v4l2_subdev *sd,

-- 
2.34.1