PCI: Remove unused ID-Based Ordering support

My philosophy is unused code is dead code.  And dead code is subject to bit
rot and is a likely source of bugs.  Use it or lose it.

This reverts b48d4425b602 ("PCI: add ID-based ordering enable/disable
support"), removing these interfaces:

    pci_enable_ido()
    pci_disable_ido()

[bhelgaas: split to separate patch, also remove prototypes from pci.h]
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 0 insertions, 40 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 84a24d16778f..6db2f1a441e9 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -2110,46 +2110,6 @@ void pci_configure_ari(struct pci_dev *dev)
         }
 }
 
-/**
- * pci_enable_ido - enable ID-based Ordering on a device
- * @dev: the PCI device
- * @type: which types of IDO to enable
- *
- * Enable ID-based ordering on @dev.  @type can contain the bits
- * %PCI_EXP_IDO_REQUEST and/or %PCI_EXP_IDO_COMPLETION to indicate
- * which types of transactions are allowed to be re-ordered.
- */
-void pci_enable_ido(struct pci_dev *dev, unsigned long type)
-{
-        u16 ctrl = 0;
-
-        if (type & PCI_EXP_IDO_REQUEST)
-                ctrl |= PCI_EXP_DEVCTL2_IDO_REQ_EN;
-        if (type & PCI_EXP_IDO_COMPLETION)
-                ctrl |= PCI_EXP_DEVCTL2_IDO_CMP_EN;
-        if (ctrl)
-                pcie_capability_set_word(dev, PCI_EXP_DEVCTL2, ctrl);
-}
-EXPORT_SYMBOL(pci_enable_ido);
-
-/**
- * pci_disable_ido - disable ID-based ordering on a device
- * @dev: the PCI device
- * @type: which types of IDO to disable
- */
-void pci_disable_ido(struct pci_dev *dev, unsigned long type)
-{
-        u16 ctrl = 0;
-
-        if (type & PCI_EXP_IDO_REQUEST)
-                ctrl |= PCI_EXP_DEVCTL2_IDO_REQ_EN;
-        if (type & PCI_EXP_IDO_COMPLETION)
-                ctrl |= PCI_EXP_DEVCTL2_IDO_CMP_EN;
-        if (ctrl)
-                pcie_capability_clear_word(dev, PCI_EXP_DEVCTL2, ctrl);
-}
-EXPORT_SYMBOL(pci_disable_ido);
-
 static int pci_acs_enable;
 
 /**