Messages in this thread | | | Date | Tue, 25 Sep 2012 08:20:16 -0700 | From | Greg KH <> | Subject | Re: Question about dev_uevent_filter |
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On Tue, Sep 25, 2012 at 11:13:43PM +0800, Lan Tianyu wrote: > > hi Greg:
[linux-usb added as it concerns them as well]
> I find only devices which has bus_type or class can add uevent callback > and output the uevent information. This is because the dev_uevent_filter just return > true for these devices. But some device may not have class and bus_type. > e.g usb endpoint, if we assigned them to usb_bus_type, device core will > try to create sysfs directory link under /sys/bus/usb. But endpoint sysfs > directory's name are same for each usb devices.e.g ep_00, every usb device will > create the endpoint. So in this situation, we can't assign usb endpoint to > usb_bus_type. So even if uevent callback was added and with some information, > it still couldn't output anything. Can we add dev->type check in the > dev_uevent_filter() and return 1 if type exits?
Wait, why do you want a uevent for a USB endpoint? What is the problem you are trying to solve here?
greg k-h
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