[PATCH v3 1/2] dmaengine: sh: rz-dmac: Improve cleanup order in probe()/remove()

[Biju Das <biju.das.jz@xxxxxxxxxxxxxx>]

We usually do cleanup in reverse order of init. Currently, in the
case of error, this is not followed in rz_dmac_probe(), and similar
case for remove().

This patch improves error handling in probe() and cleanup in
reverse order of init in the remove().

Reported-by: Pavel Machek <pavel@xxxxxxx>
Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
v2->v3:
 No change.
v1->v2:
 * Fixed typo in patch header
 * Updated patch description.
---
 drivers/dma/sh/rz-dmac.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/dma/sh/rz-dmac.c b/drivers/dma/sh/rz-dmac.c
index 9479f29692d3..229f642fde6b 100644
--- a/drivers/dma/sh/rz-dmac.c
+++ b/drivers/dma/sh/rz-dmac.c
@@ -947,7 +947,6 @@ static int rz_dmac_probe(struct platform_device *pdev)
 dma_register_err:
 	of_dma_controller_free(pdev->dev.of_node);
 err:
-	reset_control_assert(dmac->rstc);
 	channel_num = i ? i - 1 : 0;
 	for (i = 0; i < channel_num; i++) {
 		struct rz_dmac_chan *channel = &dmac->channels[i];
@@ -958,6 +957,7 @@ static int rz_dmac_probe(struct platform_device *pdev)
 				  channel->lmdesc.base_dma);
 	}
 
+	reset_control_assert(dmac->rstc);
 err_pm_runtime_put:
 	pm_runtime_put(&pdev->dev);
 err_pm_disable:
@@ -971,6 +971,8 @@ static int rz_dmac_remove(struct platform_device *pdev)
 	struct rz_dmac *dmac = platform_get_drvdata(pdev);
 	unsigned int i;
 
+	dma_async_device_unregister(&dmac->engine);
+	of_dma_controller_free(pdev->dev.of_node);
 	for (i = 0; i < dmac->n_channels; i++) {
 		struct rz_dmac_chan *channel = &dmac->channels[i];
 
@@ -979,8 +981,6 @@ static int rz_dmac_remove(struct platform_device *pdev)
 				  channel->lmdesc.base,
 				  channel->lmdesc.base_dma);
 	}
-	of_dma_controller_free(pdev->dev.of_node);
-	dma_async_device_unregister(&dmac->engine);
 	reset_control_assert(dmac->rstc);
 	pm_runtime_put(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
-- 
2.25.1