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PCI/MSI: bugfix/utilize for msi_capability_init() 

This patch fix a following bug and does a cleanup.

bug:
	commit 5993760f7f
	had a wrong change (since is_64 is boolean[0|1]):

-               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);

utilize:
	Unify separated if (entry->msi_attrib.maskbit) statements.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Acked-by: "Jike Song" <albcamus@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Hidetoshi Seto 2008-12-24 17:27:04 +09:00 committed by Jesse Barnes
parent b762666cc7
commit 0db29af1e7
1 changed files with 7 additions and 9 deletions
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16
drivers/pci/msi.c
View File

@ -398,21 +398,19 @@ 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 (entry->msi_attrib.maskbit) {
entry->mask_base = (void __iomem *)(long)msi_mask_bits_reg(pos,
entry->msi_attrib.is_64);
}
entry->dev = dev;
if (entry->msi_attrib.maskbit) {
unsigned int maskbits, temp;
unsigned int base, maskbits, temp;
base = msi_mask_bits_reg(pos, entry->msi_attrib.is_64);
entry->mask_base = (void __iomem *)(long)base;
/* All MSIs are unmasked by default, Mask them all */
pci_read_config_dword(dev,
msi_mask_bits_reg(pos, entry->msi_attrib.is_64),
&maskbits);
pci_read_config_dword(dev, base, &maskbits);
temp = (1 << multi_msi_capable(control));
temp = ((temp - 1) & ~temp);
maskbits |= temp;
pci_write_config_dword(dev, entry->msi_attrib.is_64, maskbits);
pci_write_config_dword(dev, base, maskbits);
entry->msi_attrib.maskbits_mask = temp;
}
list_add_tail(&entry->list, &dev->msi_list);