netdev - [PATCH 07/15] net: phy: split out the PHY driver request out of phy_device

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Message-Id: <20200622093744.13685-8-brgl@bgdev.pl>
Date:   Mon, 22 Jun 2020 11:37:36 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
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>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        Vladimir Oltean <vladimir.oltean@....com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Yisen Zhuang <yisen.zhuang@...wei.com>,
        Salil Mehta <salil.mehta@...wei.com>,
        Jassi Brar <jaswinder.singh@...aro.org>,
        Ilias Apalodimas <ilias.apalodimas@...aro.org>,
        Iyappan Subramanian <iyappan@...amperecomputing.com>,
        Keyur Chudgar <keyur@...amperecomputing.com>,
        Quan Nguyen <quan@...amperecomputing.com>,
        Frank Rowand <frowand.list@...il.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Fabien Parent <fparent@...libre.com>,
        Stephane Le Provost <stephane.leprovost@...iatek.com>,
        Pedro Tsai <pedro.tsai@...iatek.com>,
        Andrew Perepech <andrew.perepech@...iatek.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH 07/15] net: phy: split out the PHY driver request out of phy_device_create()

From: Bartosz Golaszewski <bgolaszewski@...libre.com>

Move the code requesting the PHY driver module out of phy_device_create()
into a separate helper. This will be later reused when we delay the
module loading.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
---
 drivers/net/phy/phy_device.c | 71 ++++++++++++++++++++----------------
 1 file changed, 39 insertions(+), 32 deletions(-)

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index f6985db08340..8037a9663a85 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -558,7 +558,7 @@ static const struct device_type mdio_bus_phy_type = {
 	.pm = MDIO_BUS_PHY_PM_OPS,
 };
 
-static int phy_request_driver_module(struct phy_device *dev, u32 phy_id)
+static int phy_do_request_driver_module(struct phy_device *dev, u32 phy_id)
 {
 	int ret;
 
@@ -578,6 +578,40 @@ static int phy_request_driver_module(struct phy_device *dev, u32 phy_id)
 	return 0;
 }
 
+static int phy_request_driver_module(struct phy_device *phydev)
+{
+	int ret;
+
+	/* Request the appropriate module unconditionally; don't
+	 * bother trying to do so only if it isn't already loaded,
+	 * because that gets complicated. A hotplug event would have
+	 * done an unconditional modprobe anyway.
+	 * We don't do normal hotplug because it won't work for MDIO
+	 * -- because it relies on the device staying around for long
+	 * enough for the driver to get loaded. With MDIO, the NIC
+	 * driver will get bored and give up as soon as it finds that
+	 * there's no driver _already_ loaded.
+	 */
+	if (phydev->is_c45) {
+		const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids);
+		int i;
+
+		for (i = 1; i < num_ids; i++) {
+			if (phydev->c45_ids.device_ids[i] == 0xffffffff)
+				continue;
+
+			ret = phy_do_request_driver_module(phydev,
+						phydev->c45_ids.device_ids[i]);
+			if (ret)
+				break;
+		}
+	} else {
+		ret = phy_do_request_driver_module(phydev, phydev->phy_id);
+	}
+
+	return ret;
+}
+
 struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id,
 				     bool is_c45,
 				     struct phy_c45_device_ids *c45_ids)
@@ -622,38 +656,11 @@ struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id,
 
 	mutex_init(&dev->lock);
 	INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
+	device_initialize(&mdiodev->dev);
 
-	/* Request the appropriate module unconditionally; don't
-	 * bother trying to do so only if it isn't already loaded,
-	 * because that gets complicated. A hotplug event would have
-	 * done an unconditional modprobe anyway.
-	 * We don't do normal hotplug because it won't work for MDIO
-	 * -- because it relies on the device staying around for long
-	 * enough for the driver to get loaded. With MDIO, the NIC
-	 * driver will get bored and give up as soon as it finds that
-	 * there's no driver _already_ loaded.
-	 */
-	if (is_c45 && c45_ids) {
-		const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
-		int i;
-
-		for (i = 1; i < num_ids; i++) {
-			if (c45_ids->device_ids[i] == 0xffffffff)
-				continue;
-
-			ret = phy_request_driver_module(dev,
-						c45_ids->device_ids[i]);
-			if (ret)
-				break;
-		}
-	} else {
-		ret = phy_request_driver_module(dev, phy_id);
-	}
-
-	if (!ret) {
-		device_initialize(&mdiodev->dev);
-	} else {
-		kfree(dev);
+	ret = phy_request_driver_module(dev);
+	if (ret) {
+		phy_device_free(dev);
 		dev = ERR_PTR(ret);
 	}
 
-- 
2.26.1