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Differential D57489

muge(4): Lock MII bus to fix link flaps
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Authored by rkitover_gmail.com on Jun 6 2026, 1:57 PM.
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Details

Reviewers
adrian
pouria
sanpei
zlei
kevlo
bms
Summary

Add a lock for MII bus operations and drop ticks if the lock is held to
work-around a race condition in the MII bus layer, see:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=252165

. Tested with the EVB-LAN7800LC-1 MICROCHIP LAN7800 evaluation board.

This should fix Ethernet on the Raspberry Pi 3 and some other models
possibly.

Signed-off-by: Rafael Kitover <rkitover@gmail.com>

Diff Detail

Repository
rG FreeBSD src repository
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Lint Skipped
Unit
Tests Skipped
Build Status
Buildable 73728
Build 70611: arc lint + arc unit

Revision Contents
Changeset List

PathSize
sys/
dev/
usb/
net/
27 lines

Diff 179343

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sys/dev/usb/net/if_muge.c

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