linux-kernel - [PATCH v1 2/5] [media] mtk-mdp: handle vb2_dma_contig_set_max_seg

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Date:   Tue,  5 May 2020 14:00:45 +1000
From:   Eizan Miyamoto <eizan@...omium.org>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Eizan Miyamoto <eizan@...gle.com>, eizan@...omium.org,
        Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
        Houlong Wei <houlong.wei@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Minghsiu Tsai <minghsiu.tsai@...iatek.com>,
        linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
        linux-mediatek@...ts.infradead.org
Subject: [PATCH v1 2/5] [media] mtk-mdp: handle vb2_dma_contig_set_max_seg_size errors during probe

This is a cleanup to better handle errors during MDP probe.

Signed-off-by: eizan@...omium.org
Signed-off-by: Eizan Miyamoto <eizan@...gle.com>
---

 drivers/media/platform/mtk-mdp/mtk_mdp_core.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
index aeaed2cf4458..c20ac7681c6f 100644
--- a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
+++ b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
@@ -193,13 +193,19 @@ static int mtk_mdp_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, mdp);
 
-	vb2_dma_contig_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));
+	ret = vb2_dma_contig_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to set vb2 dma mag seg size\n");
+		goto err_set_max_seg_size;
+	}
 
 	pm_runtime_enable(dev);
 	dev_dbg(dev, "mdp-%d registered successfully\n", mdp->id);
 
 	return 0;
 
+err_set_max_seg_size:
+
 err_m2m_register:
 	v4l2_device_unregister(&mdp->v4l2_dev);
 
-- 
2.26.2.526.g744177e7f7-goog