CVSROOT: /cvs
Module name: src
Changes by: [email protected] 2022/03/07 06:02:53
Modified files:
sys/dev/fdt : if_cad.c
Log message:
Prevent deadlock in cad_down()
Introduce an rwlock to serialize cad(4) ioctl operations so that
cad_down() can release NET_LOCK() temporarily when invoking barriers.
This releasing prevents a possible deadlock with the taskq barrier.
The deadlock was pointed out by witness(4).
In addition, release NET_LOCK() when allocating memory in cad_up()
to reduce the risk of ill effects.
