[PATCH v3 0/1] xhci: supporting msi/msi-x

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Hi Sarah,

This is xHCI MSI/MSI-X supporting patch v3.

Changelog from v2:

  - Move xhci_msi_irq before xhci_free_irq. 

  - Remove msix_entries = NULL.

  - add comments for calculating number of msi-x vectors.

  - remove unnecessary white space.

Did not change the code to use less vectors based on the return value of
pci_enable_msix(), since all other controllers in the kernel disable
msix if pci_enable_msix() return less than number of vectors requests.
Moreover, we request msi-x vectors based on number of CPU cores and USB
3.0 xhci HCSPARAMS1 capability register, which should be less than the
available from PCI core.

Thanks,
Andiry

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