dmaengine: ti: dma-crossbar: fix device leak on dra7x route allocation

commit dc7e44db01fc2498644e3106db3e62a9883a93d5 upstream.

Make sure to drop the reference taken when looking up the crossbar
platform device during dra7x route allocation.

Note that commit 615a4bfc426e ("dmaengine: ti: Add missing put_device in
ti_dra7_xbar_route_allocate") fixed the leak in the error paths but the
reference is still leaking on successful allocation.

Fixes: a074ae38f859 ("dmaengine: Add driver for TI DMA crossbar on DRA7x")
Fixes: 615a4bfc426e ("dmaengine: ti: Add missing put_device in ti_dra7_xbar_route_allocate")
Cc: stable@vger.kernel.org	# 4.2: 615a4bfc426e
Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20251117161258.10679-14-johan@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/dma/ti/dma-crossbar.c b/drivers/dma/ti/dma-crossbar.c
index f744ddbbbad7fa35e41bfd39915feb2d9cfcae73..1bc730d479dff356bfa9120693319df3d3f74b28 100644 (file)
--- a/drivers/dma/ti/dma-crossbar.c
+++ b/drivers/dma/ti/dma-crossbar.c
@@ -287,6 +287,8 @@ static void *ti_dra7_xbar_route_allocate(struct of_phandle_args *dma_spec,
 
        ti_dra7_xbar_write(xbar->iomem, map->xbar_out, map->xbar_in);
 
+       put_device(&pdev->dev);
+
        return map;
 }