linux-kernel - [PATCH v2 2/2] net: mdio: fixup ethernet phy module auto-load function

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Message-Id: <1637919957-21635-2-git-send-email-zhuyinbo@loongson.cn>
Date:   Fri, 26 Nov 2021 17:45:57 +0800
From:   Yinbo Zhu <zhuyinbo@...ngson.cn>
To:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kbuild@...r.kernel.org
Cc:     zhuyinbo@...ngson.cn
Subject: [PATCH v2 2/2] net: mdio: fixup ethernet phy module auto-load function

the phy_id is only phy identifier, that phy module auto-load function
should according the phy_id event rather than other information, this
patch is remove other unnecessary information and add phy_id event in
mdio_uevent function and ethernet phy module auto-load function will
work well.

Signed-off-by: Yinbo Zhu <zhuyinbo@...ngson.cn>
---
 drivers/net/phy/mdio_bus.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 6865d93..999f0d4 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -962,12 +962,12 @@ static int mdio_bus_match(struct device *dev, struct device_driver *drv)
 
 static int mdio_uevent(struct device *dev, struct kobj_uevent_env *env)
 {
-	int rc;
+	struct phy_device *pdev;
 
-	/* Some devices have extra OF data and an OF-style MODALIAS */
-	rc = of_device_uevent_modalias(dev, env);
-	if (rc != -ENODEV)
-		return rc;
+	pdev = to_phy_device(dev);
+
+	if (add_uevent_var(env, "MODALIAS=mdio:p%08X", pdev->phy_id))
+		return -ENOMEM;
 
 	return 0;
 }
@@ -991,7 +991,7 @@ static int mdio_uevent(struct device *dev, struct kobj_uevent_env *env)
 };
 
 struct bus_type mdio_bus_type = {
-	.name		= "mdio_bus",
+	.name		= "mdio",
 	.dev_groups	= mdio_bus_dev_groups,
 	.match		= mdio_bus_match,
 	.uevent		= mdio_uevent,
-- 
1.8.3.1