From: Michael Walle <michael@walle.cc>
To: Andrew Lunn <andrew@lunn.ch>,
Heiner Kallweit <hkallweit1@gmail.com>,
Russell King <linux@armlinux.org.uk>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>
Cc: "David S . Miller" <davem@davemloft.net>,
Xu Liang <lxu@maxlinear.com>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Florian Fainelli <f.fainelli@gmail.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Michael Walle <michael@walle.cc>
Subject: [PATCH RFC net-next v2 1/8] net: phy: mscc-miim: reject clause 45 register accesses
Date: Fri, 25 Mar 2022 22:35:11 +0100 [thread overview]
Message-ID: <20220325213518.2668832-2-michael@walle.cc> (raw)
In-Reply-To: <20220325213518.2668832-1-michael@walle.cc>
The driver doesn't support clause 45 register access yet, but doesn't
check if the access is a c45 one either. This leads to spurious register
reads and writes. Add the check.
Fixes: 542671fe4d86 ("net: phy: mscc-miim: Add MDIO driver")
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
---
drivers/net/mdio/mdio-mscc-miim.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/mdio/mdio-mscc-miim.c b/drivers/net/mdio/mdio-mscc-miim.c
index c483ba67c21f..582969751b4c 100644
--- a/drivers/net/mdio/mdio-mscc-miim.c
+++ b/drivers/net/mdio/mdio-mscc-miim.c
@@ -102,6 +102,9 @@ static int mscc_miim_read(struct mii_bus *bus, int mii_id, int regnum)
u32 val;
int ret;
+ if (regnum & MII_ADDR_C45)
+ return -EOPNOTSUPP;
+
ret = mscc_miim_wait_pending(bus);
if (ret)
goto out;
@@ -145,6 +148,9 @@ static int mscc_miim_write(struct mii_bus *bus, int mii_id,
struct mscc_miim_dev *miim = bus->priv;
int ret;
+ if (regnum & MII_ADDR_C45)
+ return -EOPNOTSUPP;
+
ret = mscc_miim_wait_pending(bus);
if (ret < 0)
goto out;
--
2.30.2
next prev parent reply other threads:[~2022-03-25 21:35 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-25 21:35 [PATCH RFC net-next v2 0/8] net: phy: C45-over-C22 access Michael Walle
2022-03-25 21:35 ` Michael Walle [this message]
2022-03-25 21:35 ` [PATCH RFC net-next v2 2/8] net: phy: mscc-miim: add probe_capabilities Michael Walle
2022-03-25 21:35 ` [PATCH RFC net-next v2 3/8] net: phy: add error checks in __phy_mmd_indirect() and export it Michael Walle
2022-03-25 21:35 ` [PATCH RFC net-next v2 4/8] net: phy: add error handling for __phy_{read,write}_mmd Michael Walle
2022-03-25 21:35 ` [PATCH RFC net-next v2 5/8] net: phy: support indirect c45 access in get_phy_c45_ids() Michael Walle
2022-03-25 21:35 ` [PATCH RFC net-next v2 6/8] net: phy: add support for C45-over-C22 transfers Michael Walle
2022-03-25 21:35 ` [PATCH RFC net-next v2 7/8] phy: net: introduce phy_promote_to_c45() Michael Walle
2022-03-25 21:35 ` [PATCH RFC net-next v2 8/8] net: phy: mxl-gpy: remove unneeded ops Michael Walle
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