diff options
Diffstat (limited to 'target/linux')
| -rw-r--r-- | target/linux/generic/backport-5.10/789-v5.15-net-dsa-qca8k-fix-kernel-panic-with-legacy-mdio-mapping.patch | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.10/789-v5.15-net-dsa-qca8k-fix-kernel-panic-with-legacy-mdio-mapping.patch b/target/linux/generic/backport-5.10/789-v5.15-net-dsa-qca8k-fix-kernel-panic-with-legacy-mdio-mapping.patch new file mode 100644 index 0000000000..1e293d3a0b --- /dev/null +++ b/target/linux/generic/backport-5.10/789-v5.15-net-dsa-qca8k-fix-kernel-panic-with-legacy-mdio-mapping.patch @@ -0,0 +1,80 @@ +From ce062a0adbfe933b1932235fdfd874c4c91d1bb0 Mon Sep 17 00:00:00 2001 +From: Ansuel Smith <ansuelsmth@gmail.com> +Date: Sat, 11 Sep 2021 17:50:09 +0200 +Subject: net: dsa: qca8k: fix kernel panic with legacy mdio mapping + +When the mdio legacy mapping is used the mii_bus priv registered by DSA +refer to the dsa switch struct instead of the qca8k_priv struct and +causes a kernel panic. Create dedicated function when the internal +dedicated mdio driver is used to properly handle the 2 different +implementation. + +Fixes: 759bafb8a322 ("net: dsa: qca8k: add support for internal phy and internal mdio") +Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com> +Signed-off-by: David S. Miller <davem@davemloft.net> +--- + drivers/net/dsa/qca8k.c | 30 ++++++++++++++++++++++-------- + 1 file changed, 22 insertions(+), 8 deletions(-) + +--- a/drivers/net/dsa/qca8k.c ++++ b/drivers/net/dsa/qca8k.c +@@ -643,10 +643,8 @@ qca8k_mdio_busy_wait(struct mii_bus *bus + } + + static int +-qca8k_mdio_write(struct mii_bus *salve_bus, int phy, int regnum, u16 data) ++qca8k_mdio_write(struct mii_bus *bus, int phy, int regnum, u16 data) + { +- struct qca8k_priv *priv = salve_bus->priv; +- struct mii_bus *bus = priv->bus; + u16 r1, r2, page; + u32 val; + int ret; +@@ -682,10 +680,8 @@ exit: + } + + static int +-qca8k_mdio_read(struct mii_bus *salve_bus, int phy, int regnum) ++qca8k_mdio_read(struct mii_bus *bus, int phy, int regnum) + { +- struct qca8k_priv *priv = salve_bus->priv; +- struct mii_bus *bus = priv->bus; + u16 r1, r2, page; + u32 val; + int ret; +@@ -727,6 +723,24 @@ exit: + } + + static int ++qca8k_internal_mdio_write(struct mii_bus *slave_bus, int phy, int regnum, u16 data) ++{ ++ struct qca8k_priv *priv = slave_bus->priv; ++ struct mii_bus *bus = priv->bus; ++ ++ return qca8k_mdio_write(bus, phy, regnum, data); ++} ++ ++static int ++qca8k_internal_mdio_read(struct mii_bus *slave_bus, int phy, int regnum) ++{ ++ struct qca8k_priv *priv = slave_bus->priv; ++ struct mii_bus *bus = priv->bus; ++ ++ return qca8k_mdio_read(bus, phy, regnum); ++} ++ ++static int + qca8k_phy_write(struct dsa_switch *ds, int port, int regnum, u16 data) + { + struct qca8k_priv *priv = ds->priv; +@@ -775,8 +789,8 @@ qca8k_mdio_register(struct qca8k_priv *p + + bus->priv = (void *)priv; + bus->name = "qca8k slave mii"; +- bus->read = qca8k_mdio_read; +- bus->write = qca8k_mdio_write; ++ bus->read = qca8k_internal_mdio_read; ++ bus->write = qca8k_internal_mdio_write; + snprintf(bus->id, MII_BUS_ID_SIZE, "qca8k-%d", + ds->index); + |