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

To: David Miller <davem@davemloft.net>; Fugang Duan
[off-list ref]
Cc: Fabio Estevam <redacted>; Lucas Stach
[off-list ref]; andrew@lunn.ch; holgerschurig@gmail.com; Troy
Kisky [off-list ref]; linux-arm-kernel@lists.infradead.org;
netdev@vger.kernel.org; Stefan Wahren [off-list ref]
Subject: [PATCH net-next RFT] net: fec: handle small PHY reset durations more
precisely

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 <redacted>
---
 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