linux-kernel - [PATCH] staging: mt7621-dma: Fix a resource leak in an error handling path

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Date:   Sun, 13 Dec 2020 16:35:13 +0100
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     gregkh@...uxfoundation.org, matthias.bgg@...il.com,
        gokcekuler@...il.com, romain.perier@...il.com,
        siddhantgupta416@...il.com, apais@...ux.microsoft.com,
        blogic@...nwrt.org, neil@...wn.name
Cc:     devel@...verdev.osuosl.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] staging: mt7621-dma: Fix a resource leak in an error handling path

If an error occurs after calling 'mtk_hsdma_init()', it must be undone by
a corresponding call to 'mtk_hsdma_uninit()' as already done in the
remove function.

Fixes: 0853c7a53eb3 ("staging: mt7621-dma: ralink: add rt2880 dma engine")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/staging/mt7621-dma/mtk-hsdma.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/mt7621-dma/mtk-hsdma.c b/drivers/staging/mt7621-dma/mtk-hsdma.c
index d241349214e7..bc4bb4374313 100644
--- a/drivers/staging/mt7621-dma/mtk-hsdma.c
+++ b/drivers/staging/mt7621-dma/mtk-hsdma.c
@@ -712,7 +712,7 @@ static int mtk_hsdma_probe(struct platform_device *pdev)
 	ret = dma_async_device_register(dd);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to register dma device\n");
-		return ret;
+		goto err_uninit_hsdma;
 	}
 
 	ret = of_dma_controller_register(pdev->dev.of_node,
@@ -728,6 +728,8 @@ static int mtk_hsdma_probe(struct platform_device *pdev)
 
 err_unregister:
 	dma_async_device_unregister(dd);
+err_uninit_hsdma:
+	mtk_hsdma_uninit(hsdma);
 	return ret;
 }
 
-- 
2.27.0