Re: [PATCH 2/3] usb: enable pci MSI/MSIX in usb core

[Alex,Shi]

> What do you mean: there is a relation between event rings
> msix_entries.vectors.  and we need to presents this relationships in the
> msix interrupt handler? 
> 
> So does the following mode you like?
> 
> request_irq(hcd->msix_entries[i].vector, msix_irq_handler, 0, "",
> hcd->ring_handler[i]);
> 
> Or another way to do it if we know which ring will handle the irq, like:

here, I mean let the driver remember this relationships. 
> 
> irqreturn_t xhci_msi_irq(int irq, struct usb_hcd *hcd)
> 
> 	switch (irq2ring(irq))
> 	case ring0: driver_handle_ring(ring0);
> 	case ring1: driver_handle_ring(ring1);
> 
> In fact, since there is no actual usage of multiple rings now, I have no
> much idea of the relationships. 
> 
> BTW, if it is possible do this change to another patch? 


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