Date: Wed, 10 Sep 2008 09:01:41 -0700 From: Sam Leffler <sam@freebsd.org> To: Weongyo Jeong <weongyo@freebsd.org> Cc: cvs-src@freebsd.org, src-committers@freebsd.org, cvs-all@freebsd.org Subject: Re: cvs commit: src/sys/dev/usb if_zyd.c if_zydreg.h Message-ID: <48C7EF65.3050204@freebsd.org> In-Reply-To: <200809100341.m8A3f5n4001038@repoman.freebsd.org> References: <200809100341.m8A3f5n4001038@repoman.freebsd.org>
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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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