PCI/MSI: skip calling pci_find_capability from msi_set_mask_bits
The position of MSI capability is already cached in the msi_desc when we enter the msi_set_mask_bits(). Use it instead. Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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