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From: Satendra Singh Thakur <sst2005@gmail.com>
To: unlisted-recipients:; (no To-header on input)
Cc: Satendra Singh Thakur <sst2005@gmail.com>,
	Sean Wang <sean.wang@mediatek.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Vinod Koul <vkoul@kernel.org>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH v1] dmaengine: mediatek: hsdma_probe: fixed a memory leak when devm_request_irq fails
Date: Sat,  9 Nov 2019 17:05:23 +0530
Message-ID: <20191109113523.6067-1-sst2005@gmail.com> (raw)
In-Reply-To: <20191105165914.GD952516@vkoul-mobl>

When devm_request_irq fails, currently, the function
dma_async_device_unregister gets called. This doesn't free
the resources allocated by of_dma_controller_register.
Therefore, we have called of_dma_controller_free for this purpose.

Signed-off-by: Satendra Singh Thakur <sst2005@gmail.com>
---
 v1: modified the subject line with new tags

 drivers/dma/mediatek/mtk-hsdma.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/mediatek/mtk-hsdma.c b/drivers/dma/mediatek/mtk-hsdma.c
index 1a2028e1c29e..4c58da742143 100644
--- a/drivers/dma/mediatek/mtk-hsdma.c
+++ b/drivers/dma/mediatek/mtk-hsdma.c
@@ -997,7 +997,7 @@ static int mtk_hsdma_probe(struct platform_device *pdev)
 	if (err) {
 		dev_err(&pdev->dev,
 			"request_irq failed with err %d\n", err);
-		goto err_unregister;
+		goto err_free;
 	}
 
 	platform_set_drvdata(pdev, hsdma);
@@ -1006,6 +1006,8 @@ static int mtk_hsdma_probe(struct platform_device *pdev)
 
 	return 0;
 
+err_free:
+	of_dma_controller_free(pdev->dev.of_node);
 err_unregister:
 	dma_async_device_unregister(dd);
 
-- 
2.17.1


  reply index

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-24  4:43 [PATCH] dma/mediatek-hs/probe: Fixed " Satendra Singh Thakur
2019-11-05 16:59 ` Vinod Koul
2019-11-09 11:35   ` Satendra Singh Thakur [this message]
2019-11-14  6:47     ` [PATCH v1] dmaengine: mediatek: hsdma_probe: fixed " Vinod Koul

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