linux-kernel - [PATCH v4 2/2] net: phy: call phy_disable_interrupts() in phy_init

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Message-ID: <20200624155923.39ff9af0@xhacker.debian>
Date:   Wed, 24 Jun 2020 15:59:23 +0800
From:   Jisheng Zhang <Jisheng.Zhang@...aptics.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v4 2/2] net: phy: call phy_disable_interrupts() in
 phy_init_hw()

Call phy_disable_interrupts() in phy_init_hw() to "have a defined init
state as we don't know in which state the PHY is if the PHY driver is
loaded. We shouldn't assume that it's the chip power-on defaults, BIOS
or boot loader could have changed this. Or in case of dual-boot
systems the other OS could leave the PHY in whatever state." as pointed
out by Heiner.

Suggested-by: Heiner Kallweit <hkallweit1@...il.com>
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@...aptics.com>
---
 drivers/net/phy/phy_device.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 04946de74fa0..6a5886202619 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -1090,6 +1090,10 @@ int phy_init_hw(struct phy_device *phydev)
 	if (ret < 0)
 		return ret;
 
+	ret = phy_disable_interrupts(phydev);
+	if (ret)
+		return ret;
+
 	if (phydev->drv->config_init)
 		ret = phydev->drv->config_init(phydev);
 
-- 
2.27.0