Messages in this thread | | | Date | Wed, 17 Jul 2013 09:35:48 -0700 | From | Greg KH <> | Subject | Re: [PATCH] usb: udc: add gadget state kobject uevent |
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On Wed, Jul 17, 2013 at 10:57:06AM +0300, Felipe Balbi wrote: > Hi, > > On Mon, Jul 15, 2013 at 11:31:17PM -0700, Greg KH wrote: > > > The question is since we default GADGET, so the g_mass_storage.ko is > > > installed early but connecting to a host PC > > > is randomly, But the udev has no idea when a host PC connects our device. > > > > > > So we consider it's reasonable to let the udev know the GADGET device state. > > > Is there any alternative to our question? > > > > I thought we already export events for gadget device states, have you > > looked for them? I can't dig through the code at the moment, but this > > seems like a pretty common issue... > > > > Felipe, any ideas? > > we already expose that in sysfs. IIRC udev can act on sysfs changes, > no ?
If something is polling the sysfs file, yes. If not, a change event should be sent to notify people that they need to go re-read it as something major happened (laptop docked, disk got removed, device changed state, etc.)
thanks,
greg k-h
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