xen/pci: Used cached MSI-X capability offset

bjorn-helgaas · konradwilk · commit 7c86617dde00 · 2013-05-10T09:10:38.000-04:00
We now cache the MSI-X capability offset in the struct pci_dev, so no
need to find the capability again.

Acked-by: Jan Beulich &lt;jbeulich@suse.com&gt;
Signed-off-by: Bjorn Helgaas &lt;bhelgaas@google.com&gt;
CC: Konrad Rzeszutek Wilk &lt;konrad.wilk@oracle.com&gt;
Signed-off-by: Konrad Rzeszutek Wilk &lt;konrad.wilk@oracle.com&gt;
diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
@@ -295,8 +295,7 @@ static int xen_initdom_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 			int pos;
 			u32 table_offset, bir;
 
-			pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
-
+			pos = dev->msix_cap;
 			pci_read_config_dword(dev, pos + PCI_MSIX_TABLE,
 					      &table_offset);
 			bir = (u8)(table_offset & PCI_MSIX_TABLE_BIR);
