linux-kernel - [PATCH 4.9 13/14] dmaengine: ti: Fix refcount leak in ti_dra7_xbar_route

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Date:   Mon, 11 Jul 2022 11:06:32 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Miaoqian Lin <linmq006@...il.com>,
        Vinod Koul <vkoul@...nel.org>
Subject: [PATCH 4.9 13/14] dmaengine: ti: Fix refcount leak in ti_dra7_xbar_route_allocate

From: Miaoqian Lin <linmq006@...il.com>

commit c132fe78ad7b4ce8b5d49a501a15c29d08eeb23a upstream.

of_parse_phandle() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not needed anymore.

Add missing of_node_put() in to fix this.

Fixes: ec9bfa1e1a79 ("dmaengine: ti-dma-crossbar: dra7: Use bitops instead of idr")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
Link: https://lore.kernel.org/r/20220605042723.17668-2-linmq006@gmail.com
Signed-off-by: Vinod Koul <vkoul@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/dma/ti-dma-crossbar.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/dma/ti-dma-crossbar.c
+++ b/drivers/dma/ti-dma-crossbar.c
@@ -274,6 +274,7 @@ static void *ti_dra7_xbar_route_allocate
 		mutex_unlock(&xbar->mutex);
 		dev_err(&pdev->dev, "Run out of free DMA requests\n");
 		kfree(map);
+		of_node_put(dma_spec->np);
 		return ERR_PTR(-ENOMEM);
 	}
 	set_bit(map->xbar_out, xbar->dma_inuse);