netdev - [PATCH v3] net: mdio: switch to using gpiod_get

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20190917000933.GA254663@dtor-ws>
Date:   Mon, 16 Sep 2019 17:09:33 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Linus Walleij <linus.walleij@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3] net: mdio: switch to using gpiod_get_optional()

The MDIO device reset line is optional and now that gpiod_get_optional()
returns proper value when GPIO support is compiled out, there is no
reason to use fwnode_get_named_gpiod() that I plan to hide away.

Let's switch to using more standard gpiod_get_optional() and
gpiod_set_consumer_name() to keep the nice "PHY reset" label.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---

v2 -> v3:

- no longer check for NULL before calling gpiod_set_consumer_name()
  as it handles NULL descriptors
- added Andy S's reviewed-by
- did NOT add Andrew's reviewed-by as I am unsure if he's OK with the
  latest iteration.

 drivers/net/phy/mdio_bus.c | 20 +++++++-------------
 1 file changed, 7 insertions(+), 13 deletions(-)

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index ce940871331e..88c6ef7c7b13 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -42,22 +42,16 @@
 
 static int mdiobus_register_gpiod(struct mdio_device *mdiodev)
 {
-	struct gpio_desc *gpiod = NULL;
+	int error;
 
 	/* Deassert the optional reset signal */
-	if (mdiodev->dev.of_node)
-		gpiod = fwnode_get_named_gpiod(&mdiodev->dev.of_node->fwnode,
-					       "reset-gpios", 0, GPIOD_OUT_LOW,
-					       "PHY reset");
-	if (IS_ERR(gpiod)) {
-		if (PTR_ERR(gpiod) == -ENOENT || PTR_ERR(gpiod) == -ENOSYS)
-			gpiod = NULL;
-		else
-			return PTR_ERR(gpiod);
-	}
-
-	mdiodev->reset_gpio = gpiod;
+	mdiodev->reset_gpio = gpiod_get_optional(&mdiodev->dev,
+						 "reset", GPIOD_OUT_LOW);
+	error = PTR_ERR_OR_ZERO(mdiodev->reset_gpio);
+	if (error)
+		return error;
 
+	gpiod_set_consumer_name(mdiodev->reset_gpio, "PHY reset");
 	return 0;
 }
 
-- 
2.23.0.237.gc6a4ce50a0-goog


-- 
Dmitry