PCI MSI: Fix MSI-X with NIU cards
The NIU device refuses to allow accesses to MSI-X registers before MSI-X is enabled. This patch fixes the problem by moving the read of the mask register to after MSI-X is enabled. Reported-by: NDavid S. Miller <davem@davemloft.net> Tested-by: NDavid S. Miller <davem@davemloft.net> Reviewed-by: NDavid S. Miller <davem@davemloft.net> Signed-off-by: NMatthew Wilcox <willy@linux.intel.com> Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
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