PCI SR-IOV: correct broken resource alignment calculations

[pandora-kernel.git] / drivers / pci / iov.c

diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index e3a8721..e03fe98 100644 (file)
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -597,6 +597,29 @@ int pci_iov_resource_bar(struct pci_dev *dev, int resno,
                4 * (resno - PCI_IOV_RESOURCES);
 }
 
+/**
+ * pci_sriov_resource_alignment - get resource alignment for VF BAR
+ * @dev: the PCI device
+ * @resno: the resource number
+ *
+ * Returns the alignment of the VF BAR found in the SR-IOV capability.
+ * This is not the same as the resource size which is defined as
+ * the VF BAR size multiplied by the number of VFs.  The alignment
+ * is just the VF BAR size.
+ */
+int pci_sriov_resource_alignment(struct pci_dev *dev, int resno)
+{
+       struct resource tmp;
+       enum pci_bar_type type;
+       int reg = pci_iov_resource_bar(dev, resno, &type);
+       
+       if (!reg)
+               return 0;
+
+        __pci_read_base(dev, type, &tmp, reg);
+       return resource_alignment(&tmp);
+}
+
 /**
  * pci_restore_iov_state - restore the state of the IOV capability
  * @dev: the PCI device