[PATCH net-next RFT] net: fec: handle small PHY reset durations more precisely

[Stefan Wahren]

Since msleep is based on jiffies the PHY reset could take longer
than expected. So use msleep for values greater than 20 msec otherwise
usleep_range.

Signed-off-by: Stefan Wahren <stefan.wah...@i2se.com>
---
 drivers/net/ethernet/freescale/fec_main.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/freescale/fec_main.c 
b/drivers/net/ethernet/freescale/fec_main.c
index 3c0255e..49f8055 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -3191,7 +3191,12 @@ static void fec_reset_phy(struct platform_device *pdev)
                dev_err(&pdev->dev, "failed to get phy-reset-gpios: %d\n", err);
                return;
        }
-       msleep(msec);
+
+       if (msec > 20)
+               msleep(msec);
+       else
+               usleep_range(msec * 1000, msec * 1000 + 1000);
+
        gpio_set_value_cansleep(phy_reset, !active_high);
 }
 #else /* CONFIG_OF */
-- 
1.7.9.5