[PATCH 08/11] dmaengine: imx-sdma: fix missing of_dma_controller_free()

[Marco Felsch]

Add the missing of_dma_controller_free() to free the resources allocated
via of_dma_controller_register(). The missing free was introduced long
time ago  by commit 23e118113782 ("dma: imx-sdma: use
module_platform_driver for SDMA driver") while adding a proper .remove()
implementation.

Fixes: 23e118113782 ("dma: imx-sdma: use module_platform_driver for SDMA driver")
Signed-off-by: Marco Felsch <m.felsch at pengutronix.de>
---
 drivers/dma/imx-sdma.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index e30dd46cf6522ee2aa4d3aca9868a01afbd29615..6c6d38b202dd2deffc36b1bd27bc7c60de3d7403 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -2232,6 +2232,13 @@ static struct dma_chan *sdma_xlate(struct of_phandle_args *dma_spec,
 				     ofdma->of_node);
 }
 
+static void sdma_dma_of_dma_controller_unregister_action(void *data)
+{
+	struct sdma_engine *sdma = data;
+
+	of_dma_controller_free(sdma->dev->of_node);
+}
+
 static void sdma_dma_device_unregister_action(void *data)
 {
 	struct sdma_engine *sdma = data;
@@ -2370,6 +2377,8 @@ static int sdma_probe(struct platform_device *pdev)
 	if (ret)
 		return dev_err_probe(dev, ret, "failed to register controller\n");
 
+	devm_add_action_or_reset(dev, sdma_dma_of_dma_controller_unregister_action, sdma);
+
 	spba_bus = of_find_compatible_node(NULL, NULL, "fsl,spba-bus");
 	ret = of_address_to_resource(spba_bus, 0, &spba_res);
 	if (!ret) {

-- 
2.47.2