PCI irq affinity fix for 4.12

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From	Christoph Hellwig <hch@lst.de>
Newsgroups	linux.kernel
Subject	PCI irq affinity fix for 4.12
Date	Sat, 20 May 2017 15:30:02 +0200
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Hi Bjorn,

Steve found a case where the !CONFIG_PCI_MSI stub for pci_alloc_irq_vectors
did the wrong thing when used with the newly converted xhci driver.  While
the PCI code has been wrong since day 1 the fact that a newly converted
drivers triggers it makes it a regression in this cycle.

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PCI irq affinity fix for 4.12 Christoph Hellwig <hch@lst.de> - 2017-05-20 15:30 +0200

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