linux-kernel - [PATCH 04/46] dmaengine: xgene-dma: use dmaenginem_async_device

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Message-Id: <20180803072016.21544-5-sjhuang@iluvatar.ai>
Date:   Fri,  3 Aug 2018 15:19:34 +0800
From:   Huang Shijie <sjhuang@...vatar.ai>
To:     vkoul@...nel.org
Cc:     dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
        dave.jiang@...el.com, radhey.shyam.pandey@...inx.com,
        appana.durga.rao@...inx.com, jmkrzyszt@...il.com,
        gomonovych@...il.com, peter.ujfalusi@...com, keescook@...omium.org,
        horms+renesas@...ge.net.au, geert+renesas@...der.be,
        shawnguo@...nel.org, baoyou.xie@...aro.org,
        michal.simek@...inx.com, baohua@...nel.org,
        ludovic.desroches@...rochip.com, linus.walleij@...aro.org,
        david.brown@...aro.org, Huang Shijie <sjhuang@...vatar.ai>
Subject: [PATCH 04/46] dmaengine: xgene-dma: use dmaenginem_async_device_register to simplify the code

Use dmaenginem_async_device_register to simplify the code:
   remove xgene_dma_async_register
   remove dma_async_device_unregister

Signed-off-by: Huang Shijie <sjhuang@...vatar.ai>
---
 drivers/dma/xgene-dma.c | 16 ++--------------
 1 file changed, 2 insertions(+), 14 deletions(-)

diff --git a/drivers/dma/xgene-dma.c b/drivers/dma/xgene-dma.c
index 1d5988849aa6..192322bbdc29 100644
--- a/drivers/dma/xgene-dma.c
+++ b/drivers/dma/xgene-dma.c
@@ -1564,7 +1564,7 @@ static int xgene_dma_async_register(struct xgene_dma *pdma, int id)
 	list_add_tail(&chan->dma_chan.device_node, &dma_dev->channels);
 
 	/* Register with Linux async DMA framework*/
-	ret = dma_async_device_register(dma_dev);
+	ret = dmaenginem_async_device_register(dma_dev);
 	if (ret) {
 		chan_err(chan, "Failed to register async device %d", ret);
 		tasklet_kill(&chan->tasklet);
@@ -1588,10 +1588,8 @@ static int xgene_dma_init_async(struct xgene_dma *pdma)
 	for (i = 0; i < XGENE_DMA_MAX_CHANNEL ; i++) {
 		ret = xgene_dma_async_register(pdma, i);
 		if (ret) {
-			for (j = 0; j < i; j++) {
-				dma_async_device_unregister(&pdma->dma_dev[j]);
+			for (j = 0; j < i; j++)
 				tasklet_kill(&pdma->chan[j].tasklet);
-			}
 
 			return ret;
 		}
@@ -1600,14 +1598,6 @@ static int xgene_dma_init_async(struct xgene_dma *pdma)
 	return ret;
 }
 
-static void xgene_dma_async_unregister(struct xgene_dma *pdma)
-{
-	int i;
-
-	for (i = 0; i < XGENE_DMA_MAX_CHANNEL; i++)
-		dma_async_device_unregister(&pdma->dma_dev[i]);
-}
-
 static void xgene_dma_init_channels(struct xgene_dma *pdma)
 {
 	struct xgene_dma_chan *chan;
@@ -1796,8 +1786,6 @@ static int xgene_dma_remove(struct platform_device *pdev)
 	struct xgene_dma_chan *chan;
 	int i;
 
-	xgene_dma_async_unregister(pdma);
-
 	/* Mask interrupts and disable DMA engine */
 	xgene_dma_mask_interrupts(pdma);
 	xgene_dma_disable(pdma);
-- 
2.17.1