net: stmmac: Use readl_poll_timeout

The dwmac_dma_reset function use an open coded of readl_poll_timeout().
Replace the open coded handling with the proper function.

Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c b/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c
index e4cda39..e60bfca 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c
@@ -17,6 +17,7 @@
 *******************************************************************************/
 
 #include <linux/io.h>
+#include <linux/iopoll.h>
 #include "common.h"
 #include "dwmac_dma.h"
 
@@ -25,19 +26,16 @@
 int dwmac_dma_reset(void __iomem *ioaddr)
 {
        u32 value = readl(ioaddr + DMA_BUS_MODE);
-       int limit;
+       int err;
 
        /* 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)
+       err = readl_poll_timeout(ioaddr + DMA_BUS_MODE, value,
+                                !(value & DMA_BUS_MODE_SFT_RESET),
+                                100000, 10000);
+       if (err)
                return -EBUSY;
 
        return 0;