netdev - [PATCH net-next v5 06/10] net: phy: marvell10g: use phy_read_mmd_poll

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Message-Id: <20200322174943.26332-7-zhengdejin5@gmail.com>
Date:   Mon, 23 Mar 2020 01:49:39 +0800
From:   Dejin Zheng <zhengdejin5@...il.com>
To:     andrew@...n.ch, f.fainelli@...il.com, hkallweit1@...il.com,
        linux@...linux.org.uk, davem@...emloft.net,
        mchehab+samsung@...nel.org, corbet@....net,
        gregkh@...uxfoundation.org, broonie@...nel.org, tglx@...utronix.de,
        netdev@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Dejin Zheng <zhengdejin5@...il.com>
Subject: [PATCH net-next v5 06/10] net: phy: marvell10g: use phy_read_mmd_poll_timeout() to simplify the code

use phy_read_mmd_poll_timeout() to replace the poll codes for
simplify mv3310_reset() function.

it should be add msleep(5) before call phy_read_mmd_poll_timeout()
to keep the code more similar, but it will report that warning, so
modify it to msleep(20).

./scripts/checkpatch.pl
v5-0006-net-phy-marvell10g-use-phy_read_mmd_poll_timeout-.patch
WARNING: msleep < 20ms can sleep for up to 20ms; see Documentation/timers/timers-howto.rst
#41: FILE: drivers/net/phy/marvell10g.c:251:
+	msleep(5);

Suggested-by: Andrew Lunn <andrew@...n.ch>
Signed-off-by: Dejin Zheng <zhengdejin5@...il.com>
---
v4 -> v5:
	- add msleep() to before call phy_read_mmd_poll_timeout()
	  to keep the code more similar.
v3 -> v4:
	- add this patch by Andrew's suggestion. Thanks Andrew!

 drivers/net/phy/marvell10g.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/drivers/net/phy/marvell10g.c b/drivers/net/phy/marvell10g.c
index 7e05b92504f0..c0fb8391c75b 100644
--- a/drivers/net/phy/marvell10g.c
+++ b/drivers/net/phy/marvell10g.c
@@ -241,22 +241,18 @@ static int mv3310_power_up(struct phy_device *phydev)
 
 static int mv3310_reset(struct phy_device *phydev, u32 unit)
 {
-	int retries, val, err;
+	int val, err;
 
 	err = phy_modify_mmd(phydev, MDIO_MMD_PCS, unit + MDIO_CTRL1,
 			     MDIO_CTRL1_RESET, MDIO_CTRL1_RESET);
 	if (err < 0)
 		return err;
 
-	retries = 20;
-	do {
-		msleep(5);
-		val = phy_read_mmd(phydev, MDIO_MMD_PCS, unit + MDIO_CTRL1);
-		if (val < 0)
-			return val;
-	} while (val & MDIO_CTRL1_RESET && --retries);
-
-	return val & MDIO_CTRL1_RESET ? -ETIMEDOUT : 0;
+	msleep(20);
+	return phy_read_mmd_poll_timeout(phydev, MDIO_MMD_PCS,
+					 unit + MDIO_CTRL1, val,
+					 !(val & MDIO_CTRL1_RESET),
+					 5000, 80000);
 }
 
 static int mv3310_get_edpd(struct phy_device *phydev, u16 *edpd)
-- 
2.25.0