linux-kernel - [RFC PATCH V0 09/10] media: mtk-mdp3: revise error handling about get/probe MDP3

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Date:   Wed, 23 Jun 2021 15:35:48 +0800
From:   Moudy Ho <moudy.ho@...iatek.com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Jernej Skrabec <jernej.skrabec@...l.net>
CC:     Maoguang Meng <maoguang.meng@...iatek.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        daoyuan huang <daoyuan.huang@...iatek.com>,
        Ping-Hsun Wu <ping-hsun.wu@...iatek.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Rob Landley <rob@...dley.net>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        <linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <tfiga@...omium.org>,
        <drinkcat@...omium.org>, <acourbot@...omium.org>,
        <pihsun@...omium.org>, <menghui.lin@...iatek.com>,
        <sj.huang@...iatek.com>, <ben.lok@...iatek.com>,
        <randy.wu@...iatek.com>, <moudy.ho@...iatek.com>,
        <srv_heupstream@...iatek.com>, <frederic.chen@...iatek.com>
Subject: [RFC PATCH V0 09/10] media: mtk-mdp3: revise error handling about get/probe MDP3

This patch is used for review before send upstream patch.
>From Alexandre Courbot's review comment: Independent from the main patch.
Revise error handling about get/probe MDP3 driver to make it stable.

Signed-off-by: Moudy Ho <moudy.ho@...iatek.com>
---
 drivers/media/platform/mtk-mdp3/mtk-mdp3-core.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/media/platform/mtk-mdp3/mtk-mdp3-core.c b/drivers/media/platform/mtk-mdp3/mtk-mdp3-core.c
index eaf5b07e720f..207b55ace97b 100644
--- a/drivers/media/platform/mtk-mdp3/mtk-mdp3-core.c
+++ b/drivers/media/platform/mtk-mdp3/mtk-mdp3-core.c
@@ -40,9 +40,9 @@ struct platform_device *mdp_get_plat_device(struct platform_device *pdev)
 	}
 
 	mdp_pdev = of_find_device_by_node(mdp_node);
+	of_node_put(mdp_node);
 	if (WARN_ON(!mdp_pdev)) {
 		dev_err(dev, "mdp pdev failed\n");
-		of_node_put(mdp_node);
 		return NULL;
 	}
 
@@ -113,7 +113,7 @@ static int mdp_probe(struct platform_device *pdev)
 	if (!mdp->job_wq) {
 		dev_err(dev, "Unable to create job workqueue\n");
 		ret = -ENOMEM;
-		goto err_destroy_job_wq;
+		goto err_deinit_comp;
 	}
 
 	mdp->clock_wq = alloc_workqueue(MDP_MODULE_NAME "-clock", WQ_FREEZABLE,
@@ -121,7 +121,7 @@ static int mdp_probe(struct platform_device *pdev)
 	if (!mdp->clock_wq) {
 		dev_err(dev, "Unable to create clock workqueue\n");
 		ret = -ENOMEM;
-		goto err_destroy_clock_wq;
+		goto err_destroy_job_wq;
 	}
 
 	mdp->scp = scp_get(pdev);
@@ -179,6 +179,8 @@ static int mdp_probe(struct platform_device *pdev)
 	destroy_workqueue(mdp->clock_wq);
 err_destroy_job_wq:
 	destroy_workqueue(mdp->job_wq);
+err_deinit_comp:
+		mdp_component_deinit(mdp);
 err_return:
 	dev_dbg(dev, "Errno %d\n", ret);
 	return ret;
-- 
2.18.0