linux-kernel - [PATCH 12/15] dmaengine: ti: dma-crossbar: fix device leak on dra7x route allocation

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Message-ID: <20251117161258.10679-14-johan@kernel.org>
Date: Mon, 17 Nov 2025 17:12:55 +0100
From: Johan Hovold <johan@...nel.org>
To: Vinod Koul <vkoul@...nel.org>
Cc: Ludovic Desroches <ludovic.desroches@...rochip.com>,
	Viresh Kumar <vireshk@...nel.org>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Vinicius Costa Gomes <vinicius.gomes@...el.com>,
	Dave Jiang <dave.jiang@...el.com>,
	Vladimir Zapolskiy <vz@...ia.com>,
	Piotr Wojtaszczyk <piotr.wojtaszczyk@...esys.com>,
	Amélie Delaunay <amelie.delaunay@...s.st.com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Peter Ujfalusi <peter.ujfalusi@...il.com>,
	dmaengine@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Johan Hovold <johan@...nel.org>,
	stable@...r.kernel.org,
	Peter Ujfalusi <peter.ujfalusi@...com>,
	Miaoqian Lin <linmq006@...il.com>
Subject: [PATCH 12/15] dmaengine: ti: dma-crossbar: fix device leak on dra7x route allocation

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@...r.kernel.org	# 4.2: 615a4bfc426e
Cc: Peter Ujfalusi <peter.ujfalusi@...com>
Cc: Miaoqian Lin <linmq006@...il.com>
Signed-off-by: Johan Hovold <johan@...nel.org>
---
 drivers/dma/ti/dma-crossbar.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/dma/ti/dma-crossbar.c b/drivers/dma/ti/dma-crossbar.c
index 7f17ee87a6dc..e52b0e139900 100644
--- a/drivers/dma/ti/dma-crossbar.c
+++ b/drivers/dma/ti/dma-crossbar.c
@@ -288,6 +288,8 @@ 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;
 }
 
-- 
2.51.0