[PATCH v3 2/2] dmaengine: ti: Add missing put_device in ti_dra7_xbar_route_allocate

[Miaoqian Lin]

of_find_device_by_node() takes reference, we should use put_device()
to release it when not need anymore.

Fixes: a074ae38f859 ("dmaengine: Add driver for TI DMA crossbar on DRA7x")
Signed-off-by: Miaoqian Lin <linmq006@xxxxxxxxx>
---
changes in v3:
- rebase so it can apply with the other patch
changes in v2:
- split v1 into two patches.
v1 link:
https://lore.kernel.org/r/20220512051815.11946-1-linmq006@xxxxxxxxx
v2 link:
https://lore.kernel.org/r/20220601110013.55366-1-linmq006@xxxxxxxxx/
---
 drivers/dma/ti/dma-crossbar.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/dma/ti/dma-crossbar.c b/drivers/dma/ti/dma-crossbar.c
index e34cfb50d241..f744ddbbbad7 100644
--- a/drivers/dma/ti/dma-crossbar.c
+++ b/drivers/dma/ti/dma-crossbar.c
@@ -245,6 +245,7 @@ static void *ti_dra7_xbar_route_allocate(struct of_phandle_args *dma_spec,
 	if (dma_spec->args[0] >= xbar->xbar_requests) {
 		dev_err(&pdev->dev, "Invalid XBAR request number: %d\n",
 			dma_spec->args[0]);
+		put_device(&pdev->dev);
 		return ERR_PTR(-EINVAL);
 	}
 
@@ -252,12 +253,14 @@ static void *ti_dra7_xbar_route_allocate(struct of_phandle_args *dma_spec,
 	dma_spec->np = of_parse_phandle(ofdma->of_node, "dma-masters", 0);
 	if (!dma_spec->np) {
 		dev_err(&pdev->dev, "Can't get DMA master\n");
+		put_device(&pdev->dev);
 		return ERR_PTR(-EINVAL);
 	}
 
 	map = kzalloc(sizeof(*map), GFP_KERNEL);
 	if (!map) {
 		of_node_put(dma_spec->np);
+		put_device(&pdev->dev);
 		return ERR_PTR(-ENOMEM);
 	}
 
@@ -269,6 +272,7 @@ static void *ti_dra7_xbar_route_allocate(struct of_phandle_args *dma_spec,
 		dev_err(&pdev->dev, "Run out of free DMA requests\n");
 		kfree(map);
 		of_node_put(dma_spec->np);
+		put_device(&pdev->dev);
 		return ERR_PTR(-ENOMEM);
 	}
 	set_bit(map->xbar_out, xbar->dma_inuse);
-- 
2.25.1