Re: USB hid blocks USB port in 2.6.28rc3

["Rafael J. Wysocki" <rjw@sisk.pl>]

On Tuesday, 11 of November 2008, Andi Kleen wrote:
> > It does.  The problem is on the other side: Your power switch presents 
> > itself as an HID device, so when it is _detected_ it binds to usbhid.
> 
> Ok, but it worked in all kernels before. Why has that changed?
> 
> Looks like a regression to me. Rafael, can you please add it to the list?

Done.

Thanks,
Rafael

 
> > > Why should sispm need to unbind someone else?
> > 
> > The usbfs API does not allow user programs to set a device's
> > configuration if any drivers are bound to the device.  Therefore, if a 
> > program wants to set a config then it must unbind all the existing 
> > drivers first.  This is a safety precaution against programs 
> > interfering with other drivers.
> > 
> > Now in fact, sispm probably doesn't need to set the configuration at 
> > all.  This is undoubtedly a holdover from a Windows version, because 
> > Windows does not set device configurations by default whereas Linus 
> > does.
> 
> So you're saying that sispm should be changed to not do something?
> What something exactly? And it would work then?
> 
> And why exactly does what it used to do before not work anymore now?