PCI: create common pcibios_err_to_errno
For returning errors out to non-PCI code. Re-name xen's version.
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 9d04599..a691f62 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -474,6 +474,32 @@
#define PCIBIOS_SET_FAILED 0x88
#define PCIBIOS_BUFFER_TOO_SMALL 0x89
+/*
+ * Translate above to generic errno for passing back through non-pci.
+ */
+static inline int pcibios_err_to_errno(int err)
+{
+ if (err <= PCIBIOS_SUCCESSFUL)
+ return err; /* Assume already errno */
+
+ switch (err) {
+ case PCIBIOS_FUNC_NOT_SUPPORTED:
+ return -ENOENT;
+ case PCIBIOS_BAD_VENDOR_ID:
+ return -EINVAL;
+ case PCIBIOS_DEVICE_NOT_FOUND:
+ return -ENODEV;
+ case PCIBIOS_BAD_REGISTER_NUMBER:
+ return -EFAULT;
+ case PCIBIOS_SET_FAILED:
+ return -EIO;
+ case PCIBIOS_BUFFER_TOO_SMALL:
+ return -ENOSPC;
+ }
+
+ return -ENOTTY;
+}
+
/* Low-level architecture-dependent routines */
struct pci_ops {