PCI: utilize calculated results when detecting MSI features

In msi_capability_init, we can make use of the calculated results
instead of calling is_mask_bit_support and is_64bit_address twice.

Signed-off-by: Jike Song <albcamus@gmail.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 4a10b56..d281201 100644 (file)
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -378,23 +378,21 @@ static int msi_capability_init(struct pci_dev *dev)
        entry->msi_attrib.masked = 1;
        entry->msi_attrib.default_irq = dev->irq;       /* Save IOAPIC IRQ */
        entry->msi_attrib.pos = pos;
-       if (is_mask_bit_support(control)) {
+       if (entry->msi_attrib.maskbit) {
                entry->mask_base = (void __iomem *)(long)msi_mask_bits_reg(pos,
-                               is_64bit_address(control));
+                               entry->msi_attrib.is_64);
        }
        entry->dev = dev;
        if (entry->msi_attrib.maskbit) {
                unsigned int maskbits, temp;
                /* All MSIs are unmasked by default, Mask them all */
                pci_read_config_dword(dev,
-                       msi_mask_bits_reg(pos, is_64bit_address(control)),
+                       msi_mask_bits_reg(pos, entry->msi_attrib.is_64),
                        &maskbits);
                temp = (1 << multi_msi_capable(control));
                temp = ((temp - 1) & ~temp);
                maskbits |= temp;
-               pci_write_config_dword(dev,
-                       msi_mask_bits_reg(pos, is_64bit_address(control)),
-                       maskbits);
+               pci_write_config_dword(dev, entry->msi_attrib.is_64, maskbits);
                entry->msi_attrib.maskbits_mask = temp;
        }
        list_add_tail(&entry->list, &dev->msi_list);