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| author |   brad <brad@openbsd.org> | 2008-09-08 07:38:33 +0000 |
|---|---|---|
| committer | brad <brad@openbsd.org> | 2008-09-08 07:38:33 +0000 |
| commit | f4e5fafb8258ea45d8373eb24602bedb5207d61e (patch) | |
| tree | a693a05ee6f4a636f0b7ac7dbe164caf4aa624c5 /sys/dev/usb/ugen.c | |
| parent | turn off CAST assembler code (i.e. use C implementation) as it has bad (diff) | |
| download | wireguard-openbsd-f4e5fafb8258ea45d8373eb24602bedb5207d61e.tar.xz wireguard-openbsd-f4e5fafb8258ea45d8373eb24602bedb5207d61e.zip | |
IEEE 802.3 Annex 28B.3 explicitly specifies the following relative
priorities of the technologies supported by 802.3 Selector Field
value.
1000BASE-T full duplex
1000BASE-T
100BASE-T2 full duplex
100BASE-TX full duplex
100BASE-T2
100BASE-T4
100BASE-TX
10BASE-T full duplex
10BAST-T
However PHY drivers did not honor the order such that 100BASE-T4 had
higher priority than 100BASE-TX full duplex. Fix a long standing bug
such that PHY drivers choose the highest common denominator ability.
This bug is exposed by a Cisco 3550 switch which inadvertently
announces 100BASE-T4 capability even though it is not capable of
100BASE-T4 operation, it is a 100BASE-TX switch.
From FreeBSD
Tested with dc(4), fxp(4), rl(4), sis(4).
Diffstat (limited to 'sys/dev/usb/ugen.c')
0 files changed, 0 insertions, 0 deletions