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Subject[PATCH net-next v3 2/2] net: stmmac: use readl_poll_timeout() function in dwmac4_dma_reset()
Date
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>
---
v2 -> v3:
- return whatever error code by readl_poll_timeout() returned.
v1 -> v2:
- no changed.

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 9becca280074..6e30d7eb4983 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)
--
2.25.0
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