dmaengine: ti: Fix refcount leak in ti_dra7_xbar_route_allocate

stable inclusion
from stable-v5.10.130
commit 37147e22cd8dfc0412495cb361708836157a4486
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5YRJO

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=37147e22cd8dfc0412495cb361708836157a4486

--------------------------------

commit c132fe78 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: ec9bfa1e ("dmaengine: ti-dma-crossbar: dra7: Use bitops instead of idr")
Signed-off-by: NMiaoqian Lin <linmq006@gmail.com>
Link: https://lore.kernel.org/r/20220605042723.17668-2-linmq006@gmail.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>

drivers/dma/ti/dma-crossbar.c

@@ -268,6 +268,7 @@ static void *ti_dra7_xbar_route_allocate(struct of_phandle_args *dma_spec,
 		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);