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net: mii: Fix the Speed display when the network cable is not connected

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Two different models of usb card, the drivers are r8152 and asix. If no
network cable is connected, Speed = 10Mb/s. This problem is repeated in
linux 3.10, 4.19, 5.4, 6.12. This problem also exists on the latest
kernel. Both drivers call mii_ethtool_get_link_ksettings,
but the value of cmd->base.speed in this
function can only be SPEED_1000 or SPEED_100 or SPEED_10.
When the network cable is not connected, set cmd->base.speed
=SPEED_UNKNOWN.

Signed-off-by: Xiangqian Zhang <zhangxiangqian@kylinos.cn>
Link: https://patch.msgid.link/20250117094603.4192594-1-zhangxiangqian@kylinos.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Xiangqian Zhang 2025-01-17 17:46:03 +08:00 • committed by Jakub Kicinski
parent 19d7750a06
commit f6f2e946aa
1 changed files with 3 additions and 0 deletions
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3
drivers/net/mii.c
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@ -213,6 +213,9 @@ void mii_ethtool_get_link_ksettings(struct mii_if_info *mii,
lp_advertising = 0;
}
if (!(bmsr & BMSR_LSTATUS))
cmd->base.speed = SPEED_UNKNOWN;
mii->full_duplex = cmd->base.duplex;
ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,