Re: [PATCH] usb/core: skip unnecessary line IRQ request for USB3

[Alex Shi]

> 
> This is not a good idea.  What happens if some USB-3 controller 
> (perhaps a non-xHCI USB-3 controller) doesn't use MSI?
> 


current usb3 driver just xhci. but sure it need to modify if non-xhci
usb pops up.

> The right way to avoid registering a legacy interrupt handler is to 
> call usb_add_hcd() with irqnum equal to 0.


a good trick! will try it tomorrow.

> 
> Alan Stern
> 




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