linux-kernel - [PATCH -next] dmaengine: iop-adma: Fix -Wint-to-pointer-cast build warning

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Date:   Mon, 3 Aug 2020 22:10:35 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     <dan.j.williams@...el.com>, <vkoul@...nel.org>
CC:     <dmaengine@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        YueHaibing <yuehaibing@...wei.com>
Subject: [PATCH -next] dmaengine: iop-adma: Fix -Wint-to-pointer-cast build warning

drivers/dma/iop-adma.c:447:13: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
drivers/dma/iop-adma.c:449:4: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
drivers/dma/iop-adma.c:1301:3: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]

Use void* for dma_desc_pool_virt, dma_addr_t for dma_desc_pool,
and use %pad to print dma_addr_t.

Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 drivers/dma/iop-adma.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/drivers/dma/iop-adma.c b/drivers/dma/iop-adma.c
index 3350bffb2e93..8e17e4405959 100644
--- a/drivers/dma/iop-adma.c
+++ b/drivers/dma/iop-adma.c
@@ -415,7 +415,8 @@ static void iop_chan_start_null_xor(struct iop_adma_chan *iop_chan);
  * */
 static int iop_adma_alloc_chan_resources(struct dma_chan *chan)
 {
-	char *hw_desc;
+	void *hw_desc;
+	dma_addr_t dma_desc;
 	int idx;
 	struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
 	struct iop_adma_desc_slot *slot = NULL;
@@ -436,17 +437,16 @@ static int iop_adma_alloc_chan_resources(struct dma_chan *chan)
 				" %d descriptor slots", idx);
 			break;
 		}
-		hw_desc = (char *) iop_chan->device->dma_desc_pool_virt;
-		slot->hw_desc = (void *) &hw_desc[idx * IOP_ADMA_SLOT_SIZE];
+		hw_desc = iop_chan->device->dma_desc_pool_virt;
+		slot->hw_desc = hw_desc + idx * IOP_ADMA_SLOT_SIZE;
 
 		dma_async_tx_descriptor_init(&slot->async_tx, chan);
 		slot->async_tx.tx_submit = iop_adma_tx_submit;
 		INIT_LIST_HEAD(&slot->tx_list);
 		INIT_LIST_HEAD(&slot->chain_node);
 		INIT_LIST_HEAD(&slot->slot_node);
-		hw_desc = (char *) iop_chan->device->dma_desc_pool;
-		slot->async_tx.phys =
-			(dma_addr_t) &hw_desc[idx * IOP_ADMA_SLOT_SIZE];
+		dma_desc = iop_chan->device->dma_desc_pool;
+		slot->async_tx.phys = dma_desc + idx * IOP_ADMA_SLOT_SIZE;
 		slot->idx = idx;
 
 		spin_lock_bh(&iop_chan->lock);
@@ -1296,9 +1296,8 @@ static int iop_adma_probe(struct platform_device *pdev)
 		goto err_free_adev;
 	}
 
-	dev_dbg(&pdev->dev, "%s: allocated descriptor pool virt %p phys %p\n",
-		__func__, adev->dma_desc_pool_virt,
-		(void *) adev->dma_desc_pool);
+	dev_dbg(&pdev->dev, "%s: allocated descriptor pool virt %p phys %pad\n",
+		__func__, adev->dma_desc_pool_virt, &adev->dma_desc_pool);
 
 	adev->id = plat_data->hw_id;
 
-- 
2.17.1