Weongyo Jeong wrote:
weongyo 2008-09-10 03:40:51 UTC
FreeBSD src repository
Modified files:
sys/dev/usb if_zyd.c if_zydreg.h
Log:
SVN rev 182900 on 2008-09-10 03:40:51Z by weongyo
rename flags and add a ZYD_FLAG_DETACHING flag to indicate we're
detaching that when the USB is pulled out forcibly during the driver is
running background scan, a page fault can be occurred even if we called
usb_rem_task() when detaching. It looks like a kind of races.
If I understand the issue, it should be handled in the 802.11 state
machine. The device should be clocked to the INIT state and as a result
clear any outstanding tasks, timers, etc. The only reason you need to
do something special is if the h/w is gone and you need to guard against
accessing it.
Sam
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