diff options
| author | Ansuel Smith <ansuelsmth@gmail.com> | 2021-05-15 00:03:51 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-05-15 01:31:45 +0300 |
| commit | 77091933e453a258bbe9ff2aeb1c8d6fc1db7ef9 (patch) | |
| tree | 7e4c475acd43daeaeea6169e882b4e25f637b0a1 /drivers/net/mdio | |
| parent | b097bea10215315e8ee17f88b4c1bbb521b1878c (diff) | |
| download | linux-77091933e453a258bbe9ff2aeb1c8d6fc1db7ef9.tar.xz | |
net: mdio: ipq8064: enlarge sleep after read/write operation
With the use of the qca8k dsa driver, some problem arised related to
port status detection. With a load on a specific port (for example a
simple speed test), the driver starts to behave in a strange way and
garbage data is produced. To address this, enlarge the sleep delay and
address a bug for the reg offset 31 that require additional delay for
this specific reg.
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/mdio')
| -rw-r--r-- | drivers/net/mdio/mdio-ipq8064.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/net/mdio/mdio-ipq8064.c b/drivers/net/mdio/mdio-ipq8064.c index 14b3c310af73..bd1aea2d5a26 100644 --- a/drivers/net/mdio/mdio-ipq8064.c +++ b/drivers/net/mdio/mdio-ipq8064.c @@ -65,7 +65,7 @@ ipq8064_mdio_read(struct mii_bus *bus, int phy_addr, int reg_offset) ((reg_offset << MII_REG_SHIFT) & MII_REG_MASK); regmap_write(priv->base, MII_ADDR_REG_ADDR, miiaddr); - usleep_range(8, 10); + usleep_range(10, 13); err = ipq8064_mdio_wait_busy(priv); if (err) @@ -91,7 +91,14 @@ ipq8064_mdio_write(struct mii_bus *bus, int phy_addr, int reg_offset, u16 data) ((reg_offset << MII_REG_SHIFT) & MII_REG_MASK); regmap_write(priv->base, MII_ADDR_REG_ADDR, miiaddr); - usleep_range(8, 10); + + /* For the specific reg 31 extra time is needed or the next + * read will produce garbage data. + */ + if (reg_offset == 31) + usleep_range(30, 43); + else + usleep_range(10, 13); return ipq8064_mdio_wait_busy(priv); } |