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| author | Chen-Yu Tsai <wens@csie.org> | 2022-03-31 21:48:32 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-20 10:06:43 +0300 |
| commit | 2340a7dd217d454adc872cfe0a764d28d835967b (patch) | |
| tree | 1e817f49afaa2a974b4158b2acb76c188386d644 | |
| parent | ce430cfad6a5385d5b7f7c1dc3fa50f10abfd41b (diff) | |
| download | linux-2340a7dd217d454adc872cfe0a764d28d835967b.tar.xz | |
net: stmmac: Fix unset max_speed difference between DT and non-DT platforms
[ Upstream commit c21cabb0fd0b54b8b54235fc1ecfe1195a23bcb2 ]
In commit 9cbadf094d9d ("net: stmmac: support max-speed device tree
property"), when DT platforms don't set "max-speed", max_speed is set to
-1; for non-DT platforms, it stays the default 0.
Prior to commit eeef2f6b9f6e ("net: stmmac: Start adding phylink support"),
the check for a valid max_speed setting was to check if it was greater
than zero. This commit got it right, but subsequent patches just checked
for non-zero, which is incorrect for DT platforms.
In commit 92c3807b9ac3 ("net: stmmac: convert to phylink_get_linkmodes()")
the conversion switched completely to checking for non-zero value as a
valid value, which caused 1000base-T to stop getting advertised by
default.
Instead of trying to fix all the checks, simply leave max_speed alone if
DT property parsing fails.
Fixes: 9cbadf094d9d ("net: stmmac: support max-speed device tree property")
Fixes: 92c3807b9ac3 ("net: stmmac: convert to phylink_get_linkmodes()")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20220331184832.16316-1-wens@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c index 2019e163e0e9..cbdd0deb7c56 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c @@ -221,8 +221,7 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac) plat->interface = of_get_phy_mode(np); /* Get max speed of operation from device tree */ - if (of_property_read_u32(np, "max-speed", &plat->max_speed)) - plat->max_speed = -1; + of_property_read_u32(np, "max-speed", &plat->max_speed); plat->bus_id = of_alias_get_id(np, "ethernet"); if (plat->bus_id < 0) |