diff options
| author | Michael Walle <michael@walle.cc> | 2022-04-05 14:02:33 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-04-06 13:57:48 +0100 |
| commit | 8d90991e5bf7fdb9f264f5f579d18969913054b7 (patch) | |
| tree | 9c509b865bd0d830fb764c35854625918d58009f | |
| parent | 9386d1811f343db5fc11aba10441108a7411e8f1 (diff) | |
net: phy: mscc-miim: reject clause 45 register accesses
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>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/mdio/mdio-mscc-miim.c | 6 |
1 files changed, 6 insertions, 0 deletions
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; |