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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 b48d4425b6 ("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>
This commit is contained in:
Stephen Hemminger 2014-01-10 14:01:11 -07:00 committed by Bjorn Helgaas
parent ecc8635608
commit 7c2dd2d7cf
2 changed files with 0 additions and 53 deletions
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40
drivers/pci/pci.c
View File

@ -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;
/**

13
include/linux/pci.h
View File

@ -997,11 +997,6 @@ static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
return __pci_enable_wake(dev, state, false, enable);
}
#define PCI_EXP_IDO_REQUEST (1<<0)
#define PCI_EXP_IDO_COMPLETION (1<<1)
void pci_enable_ido(struct pci_dev *dev, unsigned long type);
void pci_disable_ido(struct pci_dev *dev, unsigned long type);
/* For use by arch with custom probe code */
void set_pcie_port_type(struct pci_dev *pdev);
void set_pcie_hotplug_bridge(struct pci_dev *pdev);
@ -1412,14 +1407,6 @@ static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
return 0;
}
static inline void pci_enable_ido(struct pci_dev *dev, unsigned long type)
{
}
static inline void pci_disable_ido(struct pci_dev *dev, unsigned long type)
{
}
static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
{
return -EIO;