From 45d0da498ef3e534e46e76ab3a607b979b0e8e30 Mon Sep 17 00:00:00 2001
From: Dejin Zheng <zhengdejin5@gmail.com>
Date: Mon, 16 Mar 2020 10:32:54 +0800
Subject: [PATCH] net: stmmac: use readl_poll_timeout() function in
dwmac4_dma_reset()
The dwmac4_dma_reset() function use an open coded of readl_poll_timeout().
Replace the open coded handling with the proper function.
Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c | 15 ++++-----------
1 file changed, 4 insertions(+), 11 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c
index 9becca2800740..6e30d7eb4983d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c
@@ -6,6 +6,7 @@
*/
#include <linux/io.h>
+#include <linux/iopoll.h>
#include <linux/delay.h>
#include "common.h"
#include "dwmac4_dma.h"
@@ -14,22 +15,14 @@
int dwmac4_dma_reset(void __iomem *ioaddr)
{
u32 value = readl(ioaddr + DMA_BUS_MODE);
- int limit;
/* DMA SW reset */
value |= DMA_BUS_MODE_SFT_RESET;
writel(value, ioaddr + DMA_BUS_MODE);
- limit = 10;
- while (limit--) {
- if (!(readl(ioaddr + DMA_BUS_MODE) & DMA_BUS_MODE_SFT_RESET))
- break;
- mdelay(10);
- }
-
- if (limit < 0)
- return -EBUSY;
- return 0;
+ return readl_poll_timeout(ioaddr + DMA_BUS_MODE, value,
+ !(value & DMA_BUS_MODE_SFT_RESET),
+ 10000, 100000);
}
void dwmac4_set_rx_tail_ptr(void __iomem *ioaddr, u32 tail_ptr, u32 chan)
--
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