From: Greg KH <greg@kroah.com>
To: linux-hotplug@vger.kernel.org
Subject: Re: usb cold plugging
Date: Fri, 26 Mar 2004 23:15:31 +0000 [thread overview]
Message-ID: <20040326231531.GJ31372@kroah.com> (raw)
In-Reply-To: <87ekrv71kf.wl@ukai.org>
On Mon, Mar 15, 2004 at 02:58:40AM +0900, Fumitoshi UKAI wrote:
> Hi,
>
> It seems there are some problems in usb coldplugging.
>
> 1) after usb core modules loaded, it needs some time to propagate
> information to /proc or /sys. So, I think we need some wait before
> calling usb_boot_events.
> But I'm not sure it is sufficient to sleep 1 sec. are there any
> better way to wait some files in /proc or /sys ?
Sure, you can wait until the specific bus files show up under
/sys/bus/BUS_TYPE
> 2) if /sys/bus/usb/devices found, it updates DEVPATH and PRODUCT, but
> it never call /etc/hotplug/usb.agent, so no coldplugging happens.
That's not good.
> Is this patch ok to commit?
Looks good to me for now. The sleep thing can't hurt :)
Feel free to commit it.
thanks,
greg k-h
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next prev parent reply other threads:[~2004-03-26 23:15 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-14 17:58 usb cold plugging Fumitoshi UKAI
2004-03-26 23:15 ` Greg KH [this message]
2004-03-27 7:56 ` Fumitoshi UKAI
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