linux-kernel - [RESEND PATCH v5 4/7] dmaengine: hisilicon: Use macros instead of magic number

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Date:   Tue, 30 Aug 2022 14:22:48 +0800
From:   Jie Hai <haijie1@...wei.com>
To:     <vkoul@...nel.org>, <wangzhou1@...ilicon.com>
CC:     <dmaengine@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [RESEND PATCH v5 4/7] dmaengine: hisilicon: Use macros instead of magic number

readl_relaxed_poll_timeout() uses magic numbers 10 and 1000, which
indicate maximum time to sleep between reads in us and timeout in us,
respectively.

Use macros HISI_DMA_POLL_Q_STS_DELAY_US and
HISI_DMA_POLL_Q_STS_TIME_OUT_US instead of these two numbers.

Signed-off-by: Jie Hai <haijie1@...wei.com>
Acked-by: Zhou Wang <wangzhou1@...ilicon.com>
---
 drivers/dma/hisi_dma.c | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/drivers/dma/hisi_dma.c b/drivers/dma/hisi_dma.c
index 0233b42143c7..5d62fe62ba00 100644
--- a/drivers/dma/hisi_dma.c
+++ b/drivers/dma/hisi_dma.c
@@ -36,6 +36,9 @@
 
 #define PCI_BAR_2			2
 
+#define HISI_DMA_POLL_Q_STS_DELAY_US	10
+#define HISI_DMA_POLL_Q_STS_TIME_OUT_US	1000
+
 enum hisi_dma_mode {
 	EP = 0,
 	RC,
@@ -185,15 +188,19 @@ static void hisi_dma_reset_or_disable_hw_chan(struct hisi_dma_chan *chan,
 {
 	struct hisi_dma_dev *hdma_dev = chan->hdma_dev;
 	u32 index = chan->qp_num, tmp;
+	void __iomem *addr;
 	int ret;
 
 	hisi_dma_pause_dma(hdma_dev, index, true);
 	hisi_dma_enable_dma(hdma_dev, index, false);
 	hisi_dma_mask_irq(hdma_dev, index);
 
-	ret = readl_relaxed_poll_timeout(hdma_dev->base +
-		HISI_DMA_Q_FSM_STS + index * HISI_DMA_OFFSET, tmp,
-		FIELD_GET(HISI_DMA_FSM_STS_MASK, tmp) != RUN, 10, 1000);
+	addr = hdma_dev->base +
+	       HISI_DMA_Q_FSM_STS + index * HISI_DMA_OFFSET;
+
+	ret = readl_relaxed_poll_timeout(addr, tmp,
+		FIELD_GET(HISI_DMA_FSM_STS_MASK, tmp) != RUN,
+		HISI_DMA_POLL_Q_STS_DELAY_US, HISI_DMA_POLL_Q_STS_TIME_OUT_US);
 	if (ret) {
 		dev_err(&hdma_dev->pdev->dev, "disable channel timeout!\n");
 		WARN_ON(1);
@@ -208,9 +215,9 @@ static void hisi_dma_reset_or_disable_hw_chan(struct hisi_dma_chan *chan,
 		hisi_dma_unmask_irq(hdma_dev, index);
 	}
 
-	ret = readl_relaxed_poll_timeout(hdma_dev->base +
-		HISI_DMA_Q_FSM_STS + index * HISI_DMA_OFFSET, tmp,
-		FIELD_GET(HISI_DMA_FSM_STS_MASK, tmp) == IDLE, 10, 1000);
+	ret = readl_relaxed_poll_timeout(addr, tmp,
+		FIELD_GET(HISI_DMA_FSM_STS_MASK, tmp) == IDLE,
+		HISI_DMA_POLL_Q_STS_DELAY_US, HISI_DMA_POLL_Q_STS_TIME_OUT_US);
 	if (ret) {
 		dev_err(&hdma_dev->pdev->dev, "reset channel timeout!\n");
 		WARN_ON(1);
-- 
2.33.0