[PATCH 5.15 226/230] dmaengine: ti: Fix refcount leak in ti_dra7_xbar_route_allocate

From: Greg Kroah-Hartman
Date: Mon Jul 11 2022 - 06:05:56 EST

From: Miaoqian Lin <linmq006@xxxxxxxxx>

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@xxxxxxxxx>
Link: https://lore.kernel.org/r/20220605042723.17668-2-linmq006@xxxxxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
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
@@ -268,6 +268,7 @@ static void *ti_dra7_xbar_route_allocate
dev_err(&pdev->dev, "Run out of free DMA requests\n");
+ of_node_put(dma_spec->np);
return ERR_PTR(-ENOMEM);
set_bit(map->xbar_out, xbar->dma_inuse);