linux-kernel - [PATCH 5/8] media: rzg2l-cru: csi2: Use temporary variable for struct device in rzg2l_csi2

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Message-Id: <20250210114540.524790-6-tommaso.merciai.xr@bp.renesas.com>
Date: Mon, 10 Feb 2025 12:45:37 +0100
From: Tommaso Merciai <tomm.merciai@...il.com>
To: tomm.merciai@...il.com
Cc: linux-renesas-soc@...r.kernel.org,
	linux-media@...r.kernel.org,
	biju.das.jz@...renesas.com,
	prabhakar.mahadev-lad.rj@...renesas.com,
	Tommaso Merciai <tommaso.merciai.xr@...renesas.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
	Hans Verkuil <hverkuil@...all.nl>,
	Uwe Kleine-König <u.kleine-koenig@...libre.com>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 5/8] media: rzg2l-cru: csi2: Use temporary variable for struct device in rzg2l_csi2_probe()

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

Use a temporary variable for the struct device pointers to avoid
dereferencing.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
---
 .../platform/renesas/rzg2l-cru/rzg2l-csi2.c   | 31 ++++++++++---------
 1 file changed, 16 insertions(+), 15 deletions(-)

diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c
index 881e910dce02..948f1917b830 100644
--- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c
+++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c
@@ -764,10 +764,11 @@ static const struct media_entity_operations rzg2l_csi2_entity_ops = {
 
 static int rzg2l_csi2_probe(struct platform_device *pdev)
 {
+	struct device *dev = &pdev->dev;
 	struct rzg2l_csi2 *csi2;
 	int ret;
 
-	csi2 = devm_kzalloc(&pdev->dev, sizeof(*csi2), GFP_KERNEL);
+	csi2 = devm_kzalloc(dev, sizeof(*csi2), GFP_KERNEL);
 	if (!csi2)
 		return -ENOMEM;
 
@@ -775,28 +776,28 @@ static int rzg2l_csi2_probe(struct platform_device *pdev)
 	if (IS_ERR(csi2->base))
 		return PTR_ERR(csi2->base);
 
-	csi2->cmn_rstb = devm_reset_control_get_exclusive(&pdev->dev, "cmn-rstb");
+	csi2->cmn_rstb = devm_reset_control_get_exclusive(dev, "cmn-rstb");
 	if (IS_ERR(csi2->cmn_rstb))
-		return dev_err_probe(&pdev->dev, PTR_ERR(csi2->cmn_rstb),
+		return dev_err_probe(dev, PTR_ERR(csi2->cmn_rstb),
 				     "Failed to get cpg cmn-rstb\n");
 
-	csi2->presetn = devm_reset_control_get_shared(&pdev->dev, "presetn");
+	csi2->presetn = devm_reset_control_get_shared(dev, "presetn");
 	if (IS_ERR(csi2->presetn))
-		return dev_err_probe(&pdev->dev, PTR_ERR(csi2->presetn),
+		return dev_err_probe(dev, PTR_ERR(csi2->presetn),
 				     "Failed to get cpg presetn\n");
 
-	csi2->sysclk = devm_clk_get(&pdev->dev, "system");
+	csi2->sysclk = devm_clk_get(dev, "system");
 	if (IS_ERR(csi2->sysclk))
-		return dev_err_probe(&pdev->dev, PTR_ERR(csi2->sysclk),
+		return dev_err_probe(dev, PTR_ERR(csi2->sysclk),
 				     "Failed to get system clk\n");
 
-	csi2->vclk = devm_clk_get(&pdev->dev, "video");
+	csi2->vclk = devm_clk_get(dev, "video");
 	if (IS_ERR(csi2->vclk))
-		return dev_err_probe(&pdev->dev, PTR_ERR(csi2->vclk),
+		return dev_err_probe(dev, PTR_ERR(csi2->vclk),
 				     "Failed to get video clock\n");
 	csi2->vclk_rate = clk_get_rate(csi2->vclk);
 
-	csi2->dev = &pdev->dev;
+	csi2->dev = dev;
 
 	platform_set_drvdata(pdev, csi2);
 
@@ -804,18 +805,18 @@ static int rzg2l_csi2_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	pm_runtime_enable(&pdev->dev);
+	pm_runtime_enable(dev);
 
 	ret = rzg2l_validate_csi2_lanes(csi2);
 	if (ret)
 		goto error_pm;
 
-	csi2->subdev.dev = &pdev->dev;
+	csi2->subdev.dev = dev;
 	v4l2_subdev_init(&csi2->subdev, &rzg2l_csi2_subdev_ops);
 	csi2->subdev.internal_ops = &rzg2l_csi2_internal_ops;
-	v4l2_set_subdevdata(&csi2->subdev, &pdev->dev);
+	v4l2_set_subdevdata(&csi2->subdev, dev);
 	snprintf(csi2->subdev.name, sizeof(csi2->subdev.name),
-		 "csi-%s", dev_name(&pdev->dev));
+		 "csi-%s", dev_name(dev));
 	csi2->subdev.flags = V4L2_SUBDEV_FL_HAS_DEVNODE;
 
 	csi2->subdev.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
@@ -852,7 +853,7 @@ static int rzg2l_csi2_probe(struct platform_device *pdev)
 	v4l2_async_nf_cleanup(&csi2->notifier);
 	media_entity_cleanup(&csi2->subdev.entity);
 error_pm:
-	pm_runtime_disable(&pdev->dev);
+	pm_runtime_disable(dev);
 
 	return ret;
 }
-- 
2.34.1