linux-kernel - [PATCH 7/9] media: stm32: csi: remove useless fwnode_graph_get

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Message-ID: <20241217-csi_dcmipp_mp25_enhancements-v1-7-2b432805d17d@foss.st.com>
Date: Tue, 17 Dec 2024 18:39:24 +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 7/9] media: stm32: csi: remove useless
 fwnode_graph_get_endpoint call

The endpoint is already retrieved at the beginning of the function
stm32_csi_parse_dt hence keep the endpoint pointer until the end
instead of getting a new one.

Signed-off-by: Alain Volmat <alain.volmat@...s.st.com>
---
 drivers/media/platform/st/stm32/stm32-csi.c | 20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

diff --git a/drivers/media/platform/st/stm32/stm32-csi.c b/drivers/media/platform/st/stm32/stm32-csi.c
index 4affbc00b042..1be12c9dcf55 100644
--- a/drivers/media/platform/st/stm32/stm32-csi.c
+++ b/drivers/media/platform/st/stm32/stm32-csi.c
@@ -932,38 +932,32 @@ static int stm32_csi_parse_dt(struct stm32_csi_dev *csidev)
 	}
 
 	ret = v4l2_fwnode_endpoint_parse(ep, &v4l2_ep);
-	fwnode_handle_put(ep);
 	if (ret) {
 		dev_err(csidev->dev, "Could not parse v4l2 endpoint\n");
-		return ret;
+		goto out;
 	}
 
 	csidev->num_lanes = v4l2_ep.bus.mipi_csi2.num_data_lanes;
 	if (csidev->num_lanes > STM32_CSI_LANES_MAX) {
 		dev_err(csidev->dev, "Unsupported number of data-lanes: %d\n",
 			csidev->num_lanes);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto out;
 	}
 
 	memcpy(csidev->lanes, v4l2_ep.bus.mipi_csi2.data_lanes,
 	       sizeof(csidev->lanes));
 
-	ep = fwnode_graph_get_next_endpoint(dev_fwnode(csidev->dev), NULL);
-	if (!ep) {
-		dev_err(csidev->dev, "Failed to get next endpoint\n");
-		return -EINVAL;
-	}
-
 	v4l2_async_subdev_nf_init(&csidev->notifier, &csidev->sd);
 
 	asd = v4l2_async_nf_add_fwnode_remote(&csidev->notifier, ep,
 					      struct v4l2_async_connection);
 
-	fwnode_handle_put(ep);
 
 	if (IS_ERR(asd)) {
 		dev_err(csidev->dev, "Failed to add fwnode remote subdev\n");
-		return PTR_ERR(asd);
+		ret = PTR_ERR(asd);
+		goto out;
 	}
 
 	csidev->notifier.ops = &stm32_csi_notifier_ops;
@@ -972,9 +966,11 @@ static int stm32_csi_parse_dt(struct stm32_csi_dev *csidev)
 	if (ret) {
 		dev_err(csidev->dev, "Failed to register notifier\n");
 		v4l2_async_nf_cleanup(&csidev->notifier);
-		return ret;
+		goto out;
 	}
 
+out:
+	fwnode_handle_put(ep);
 	return ret;
 }
 

-- 
2.34.1