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| author | Andrey Smirnov <andrew.smirnov@gmail.com> | 2017-12-04 07:27:17 -0800 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2017-12-06 15:49:15 +0100 |
| commit | 9b1a209c8c3a60531e9a4308acf5288c755cef1b (patch) | |
| tree | 00968b12f5dd14131c0bfd9f05e5c5b9c9a7edab /drivers/net/phy | |
| parent | ed6e3a1fb0940b68c1f5f19f8e2bc4721211fb4e (diff) | |
| download | barebox-9b1a209c8c3a60531e9a4308acf5288c755cef1b.tar.gz barebox-9b1a209c8c3a60531e9a4308acf5288c755cef1b.tar.xz | |
net: mdio-mux: Avoid probing multiplexed busses
Calling mdiobus_detect() for a bus that serves as a parent for a MDIO
bus multiplexer would result in parent bus being populated with
devices that are present on downstream bus that multiplexer happens to
be "pointing" at that moment. To avoid that introduce 'is_multiplexed'
flag to struct mii_bus and change mdiobus_detect to ignore busses for
which that flag is set.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/net/phy')
| -rw-r--r-- | drivers/net/phy/mdio-mux.c | 1 | ||||
| -rw-r--r-- | drivers/net/phy/mdio_bus.c | 3 |
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/phy/mdio-mux.c b/drivers/net/phy/mdio-mux.c index 4e924e5863..1f57d86c6f 100644 --- a/drivers/net/phy/mdio-mux.c +++ b/drivers/net/phy/mdio-mux.c @@ -137,6 +137,7 @@ int mdio_mux_init(struct device_d *dev, } } + parent_bus->is_multiplexed = true; return 0; } EXPORT_SYMBOL_GPL(mdio_mux_init); diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c index 6ae85692da..d209716a14 100644 --- a/drivers/net/phy/mdio_bus.c +++ b/drivers/net/phy/mdio_bus.c @@ -32,6 +32,9 @@ int mdiobus_detect(struct device_d *dev) struct mii_bus *mii = to_mii_bus(dev); int i, ret; + if (mii->is_multiplexed) + return 0; + for (i = 0; i < PHY_MAX_ADDR; i++) { struct phy_device *phydev; |