linux-kernel - [PATCH 1/9] drm/msm: Use the devm variant of of_platform

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Date:   Fri, 10 Jul 2020 16:02:16 -0700
From:   Douglas Anderson <dianders@...omium.org>
To:     Rob Herring <robh+dt@...nel.org>, Rob Clark <robdclark@...il.com>,
        Sean Paul <sean@...rly.run>, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        Douglas Anderson <dianders@...omium.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>, linux-kernel@...r.kernel.org
Subject: [PATCH 1/9] drm/msm: Use the devm variant of of_platform_populate()

Let's save ourselves some hassle and use the devm variant of
of_platform_populate() do we don't need to worry about manually
depopulating.

Signed-off-by: Douglas Anderson <dianders@...omium.org>
---

 drivers/gpu/drm/msm/msm_drv.c | 20 ++++----------------
 1 file changed, 4 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index f6ce40bf3699..78b09fde9e29 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -1208,7 +1208,7 @@ static int add_display_components(struct device *dev,
 	if (of_device_is_compatible(dev->of_node, "qcom,mdss") ||
 	    of_device_is_compatible(dev->of_node, "qcom,sdm845-mdss") ||
 	    of_device_is_compatible(dev->of_node, "qcom,sc7180-mdss")) {
-		ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
+		ret = devm_of_platform_populate(dev);
 		if (ret) {
 			DRM_DEV_ERROR(dev, "failed to populate children devices\n");
 			return ret;
@@ -1217,7 +1217,6 @@ static int add_display_components(struct device *dev,
 		mdp_dev = device_find_child(dev, NULL, compare_name_mdp);
 		if (!mdp_dev) {
 			DRM_DEV_ERROR(dev, "failed to find MDSS MDP node\n");
-			of_platform_depopulate(dev);
 			return -ENODEV;
 		}
 
@@ -1232,8 +1231,6 @@ static int add_display_components(struct device *dev,
 	}
 
 	ret = add_components_mdp(mdp_dev, matchptr);
-	if (ret)
-		of_platform_depopulate(dev);
 
 	return ret;
 }
@@ -1300,30 +1297,21 @@ static int msm_pdev_probe(struct platform_device *pdev)
 
 	ret = add_gpu_components(&pdev->dev, &match);
 	if (ret)
-		goto fail;
+		return ret;
 
 	/* on all devices that I am aware of, iommu's which can map
 	 * any address the cpu can see are used:
 	 */
 	ret = dma_set_mask_and_coherent(&pdev->dev, ~0);
 	if (ret)
-		goto fail;
-
-	ret = component_master_add_with_match(&pdev->dev, &msm_drm_ops, match);
-	if (ret)
-		goto fail;
-
-	return 0;
+		return ret;
 
-fail:
-	of_platform_depopulate(&pdev->dev);
-	return ret;
+	return component_master_add_with_match(&pdev->dev, &msm_drm_ops, match);
 }
 
 static int msm_pdev_remove(struct platform_device *pdev)
 {
 	component_master_del(&pdev->dev, &msm_drm_ops);
-	of_platform_depopulate(&pdev->dev);
 
 	return 0;
 }
-- 
2.27.0.383.g050319c2ae-goog