linux-kernel - [PATCH] dmaengine: xilinx_dma: call of_node_put() when breaking out of for_each_child_of

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Message-ID: <20221122021612.1908866-1-liushixin2@huawei.com>
Date:   Tue, 22 Nov 2022 10:16:12 +0800
From:   Liu Shixin <liushixin2@...wei.com>
To:     Vinod Koul <vkoul@...nel.org>,
        Michal Simek <michal.simek@...inx.com>
CC:     <dmaengine@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, Liu Shixin <liushixin2@...wei.com>
Subject: [PATCH] dmaengine: xilinx_dma: call of_node_put() when breaking out of for_each_child_of_node()

Since for_each_child_of_node() will increase the refcount of node, we need
to call of_node_put() manually when breaking out of the iteration.

Fixes: 9cd4360de609 ("dma: Add Xilinx AXI Video Direct Memory Access Engine driver support")
Signed-off-by: Liu Shixin <liushixin2@...wei.com>
---
 drivers/dma/xilinx/xilinx_dma.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index 8cd4e69dc7b4..766017570488 100644
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -3141,8 +3141,10 @@ static int xilinx_dma_probe(struct platform_device *pdev)
 	/* Initialize the channels */
 	for_each_child_of_node(node, child) {
 		err = xilinx_dma_child_probe(xdev, child);
-		if (err < 0)
+		if (err < 0) {
+			of_node_put(child);
 			goto error;
+		}
 	}
 
 	if (xdev->dma_config->dmatype == XDMA_TYPE_VDMA) {
-- 
2.25.1