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Message-Id: <20221227-v6-2-rc1-c45-seperation-v3-3-ade1deb438da@walle.cc>
Date: Mon, 09 Jan 2023 16:30:43 +0100
From: Michael Walle <michael@...le.cc>
To: Heiner Kallweit <hkallweit1@...il.com>,
Russell King <linux@...linux.org.uk>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Jose Abreu <Jose.Abreu@...opsys.com>,
Sergey Shtylyov <s.shtylyov@....ru>,
Wei Fang <wei.fang@....com>,
Shenwei Wang <shenwei.wang@....com>,
Clark Wang <xiaoning.wang@....com>,
NXP Linux Team <linux-imx@....com>,
Sean Wang <sean.wang@...iatek.com>,
Landen Chao <Landen.Chao@...iatek.com>,
DENG Qingfang <dqfext@...il.com>,
Florian Fainelli <f.fainelli@...il.com>,
Vladimir Oltean <olteanv@...il.com>,
Matthias Brugger <matthias.bgg@...il.com>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-renesas-soc@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, Andrew Lunn <andrew@...n.ch>,
Geert Uytterhoeven <geert+renesas@...der.be>,
Michael Walle <michael@...le.cc>,
Vladimir Oltean <vladimir.oltean@....com>
Subject: [PATCH net-next v3 03/11] net: mdio: mdiobus_register: update validation test
From: Andrew Lunn <andrew@...n.ch>
Now that C45 uses its own read/write methods, the validation performed
when a bus is registers needs updating. All combinations of C22 and
C45 are supported, but both read and write methods must be provided,
read only busses are not supported etc.
Signed-off-by: Andrew Lunn <andrew@...n.ch>
Signed-off-by: Michael Walle <michael@...le.cc>
---
v2:
- [al] be consistent with other checks
- [mw] make the test a bit easier to read
v3:
- [mw] use the original validation test style again but with double
negation
---
drivers/net/phy/mdio_bus.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index bde195864c17..c992a9fd8b01 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -526,8 +526,15 @@ int __mdiobus_register(struct mii_bus *bus, struct module *owner)
int i, err;
struct gpio_desc *gpiod;
- if (NULL == bus || NULL == bus->name ||
- NULL == bus->read || NULL == bus->write)
+ if (!bus || !bus->name)
+ return -EINVAL;
+
+ /* An access method always needs both read and write operations */
+ if (!!bus->read != !!bus->write || !!bus->read_c45 != !!bus->write_c45)
+ return -EINVAL;
+
+ /* At least one method is mandatory */
+ if (!bus->read && !bus->read_c45)
return -EINVAL;
if (bus->parent && bus->parent->of_node)
--
2.30.2
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