dmaengine: sh: rz-dmac: Improve cleanup order in probe()/remove()

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@denx.de>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Pavel Machek <pavel@denx.de>
Link: https://lore.kernel.org/r/20230706112150.198941-2-biju.das.jz@bp.renesas.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

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);