linux-kernel - [PATCH 3/3] dma: mv_xor: use devm for request

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Message-ID: <20241001215905.316366-4-rosenp@gmail.com>
Date: Tue,  1 Oct 2024 14:59:05 -0700
From: Rosen Penev <rosenp@...il.com>
To: dmaengine@...r.kernel.org
Cc: Vinod Koul <vkoul@...nel.org>,
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 3/3] dma: mv_xor: use devm for request_irq

This is only called in _probe. Removes the need to manually free_irq.

Same with irq_dispose_mapping.

Signed-off-by: Rosen Penev <rosenp@...il.com>
---
 drivers/dma/mv_xor.c | 21 +++++++--------------
 1 file changed, 7 insertions(+), 14 deletions(-)

diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index 54e3c24d1666..3a0044bff993 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -1025,8 +1025,6 @@ static int mv_xor_channel_remove(struct mv_xor_chan *mv_chan)
 		list_del(&chan->device_node);
 	}
 
-	free_irq(mv_chan->irq, mv_chan);
-
 	return 0;
 }
 
@@ -1102,8 +1100,9 @@ mv_xor_channel_add(struct mv_xor_device *xordev,
 	/* clear errors before enabling interrupts */
 	mv_chan_clear_err_status(mv_chan);
 
-	ret = request_irq(mv_chan->irq, mv_xor_interrupt_handler,
-			  0, dev_name(&pdev->dev), mv_chan);
+	ret = devm_request_irq(&pdev->dev, mv_chan->irq,
+			       mv_xor_interrupt_handler, 0,
+			       dev_name(&pdev->dev), mv_chan);
 	if (ret)
 		goto err_free_dma;
 
@@ -1128,14 +1127,14 @@ mv_xor_channel_add(struct mv_xor_device *xordev,
 		ret = mv_chan_memcpy_self_test(mv_chan);
 		dev_dbg(&pdev->dev, "memcpy self test returned %d\n", ret);
 		if (ret)
-			goto err_free_irq;
+			goto err_free_dma;
 	}
 
 	if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) {
 		ret = mv_chan_xor_self_test(mv_chan);
 		dev_dbg(&pdev->dev, "xor self test returned %d\n", ret);
 		if (ret)
-			goto err_free_irq;
+			goto err_free_dma;
 	}
 
 	dev_info(&pdev->dev, "Marvell XOR (%s): ( %s%s%s)\n",
@@ -1146,12 +1145,10 @@ mv_xor_channel_add(struct mv_xor_device *xordev,
 
 	ret = dma_async_device_register(dma_dev);
 	if (ret)
-		goto err_free_irq;
+		goto err_free_dma;
 
 	return mv_chan;
 
-err_free_irq:
-	free_irq(mv_chan->irq, mv_chan);
 err_free_dma:
 	dma_free_coherent(&pdev->dev, MV_XOR_POOL_SIZE,
 			  mv_chan->dma_desc_pool_virt, mv_chan->dma_desc_pool);
@@ -1382,7 +1379,6 @@ static int mv_xor_probe(struct platform_device *pdev)
 						  cap_mask, irq);
 			if (IS_ERR(chan)) {
 				ret = PTR_ERR(chan);
-				irq_dispose_mapping(irq);
 				goto err_channel_add;
 			}
 
@@ -1417,11 +1413,8 @@ static int mv_xor_probe(struct platform_device *pdev)
 
 err_channel_add:
 	for (i = 0; i < MV_XOR_MAX_CHANNELS; i++)
-		if (xordev->channels[i]) {
+		if (xordev->channels[i])
 			mv_xor_channel_remove(xordev->channels[i]);
-			if (pdev->dev.of_node)
-				irq_dispose_mapping(xordev->channels[i]->irq);
-		}
 
 	return ret;
 }
-- 
2.46.2