Re: [patch 2.6.24-rc3] usb peripheral controller driver oops avoidance

On Mon, 19 Nov 2007, David Brownell wrote:

> > net2280 and dummy_hcd are different from the other device controllers 
> 
> Maybe dummy_hcd is, but net2280 doesn't do that.  In fact it
> already has that dev.driver = NULL line, which is why it did
> not get added.

Sorry, my mistake.

> > in that they register the gadget driver with the driver core.  Hence 
> > they don't need this extra action when unregistering a gadget driver.
> 
> ISTR trying to make net2280 bind to the driver core way way
> way back when, but the driver core complained about it since
> it demanded that there be some (pointless singleton) bus
> associated with the driver, else it'd hijack me to oopsville.

It would be appropriate to use the platform bus.  In fact, I have 
thought for some time that struct gadget should contain an embedded 
struct platform_device instead of an embedded struct device.  It would 
be a nuisance to change everything over now, though.

> OK, I'll take the dummy_hcd bit out -- but add a comment to
> highlight this unique behavior.

Thanks.

Alan Stern


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