[PATCH 4.19 30/31] dmaengine: ti: Fix refcount leak in ti_dra7_xbar_route_allocate

Greg Kroah-Hartman
2022-07-11T09:13:03Z

From: Miaoqian Lin <linmq006@gmail.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@gmail.com>
Link: https://lore.kernel.org/r/20220605042723.17668-2-linmq006@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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);