I encountered a deadlock in bcm43xx-d80211.
bcm43xx_free_board() | bcm43xx_periodic_work_handler()
------------------------------+--------------------------------
locks bcm->mutex |
|
calls bcm43xx_sysfs_unregister|
which sleeps |
|bcm43xx_periodic_work_handler is
|started
|
|tries to lock bcm->mutex and
|sleeps
calls |
bcm43xx_periodic_tasks_delete |
which waits for periodic_work |
to finish |
*** deadlock ***
It is reproducible by following script:
ifconfig wlan0 up
ip link list wlan0 &
ip link list wmaster0 &
ifconfig wlan0 down
--
Jiri Benc
SUSE Labs
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