PCI: add interface to set visible size of VPD

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

diff --git a/drivers/pci/access.c b/drivers/pci/access.c
index 86ec4ad..3814447 100644 (file)
--- a/drivers/pci/access.c
+++ b/drivers/pci/access.c
@@ -339,6 +339,29 @@ int pci_vpd_pci22_init(struct pci_dev *dev)
        return 0;
 }
 
+/**
+ * pci_vpd_truncate - Set available Vital Product Data size
+ * @dev:       pci device struct
+ * @size:      available memory in bytes
+ *
+ * Adjust size of available VPD area.
+ */
+int pci_vpd_truncate(struct pci_dev *dev, size_t size)
+{
+       if (!dev->vpd)
+               return -EINVAL;
+
+       /* limited by the access method */
+       if (size > dev->vpd->len)
+               return -EINVAL;
+
+       dev->vpd->len = size;
+       dev->vpd->attr->size = size;
+
+       return 0;
+}
+EXPORT_SYMBOL(pci_vpd_truncate);
+
 /**
  * pci_block_user_cfg_access - Block userspace PCI config reads/writes
  * @dev:       pci device struct