PCI: remove useless pci driver method

Remove pointless and never-called enable_wake() hook from pci_driver and
from documentation.  Evidently this was introduced in the 2.4.6 kernel,
but there's no evidence it was ever called; and it was rarely implemented.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

8 files changed, 0 insertions, 64 deletions

diff --git a/Documentation/pci.txt b/Documentation/pci.txt
index d38261b67905..7d3da30ff0b4 100644
--- a/Documentation/pci.txt
+++ b/Documentation/pci.txt
@@ -113,9 +113,6 @@ initialization with a pointer to a structure describing the driver
                 (Please see Documentation/power/pci.txt for descriptions
                 of PCI Power Management and the related functions.)
 
-        enable_wake     Enable device to generate wake events from a low power
-                        state.
-
         shutdown        Hook into reboot_notifier_list (kernel/sys.c).
                         Intended to stop any idling DMA operations.
                         Useful for enabling wake-on-lan (NIC) or changing
diff --git a/Documentation/power/pci.txt b/Documentation/power/pci.txt
index e00b099a4b86..dd8fe43888d3 100644
--- a/Documentation/power/pci.txt
+++ b/Documentation/power/pci.txt
@@ -164,7 +164,6 @@ struct pci_driver:
 
         int  (*suspend) (struct pci_dev *dev, pm_message_t state);
         int  (*resume) (struct pci_dev *dev);
-        int  (*enable_wake) (struct pci_dev *dev, pci_power_t state, int enable);
 
 
 suspend
@@ -251,42 +250,6 @@ The driver should update the current_state field in its pci_dev structure in
 this function, except for PM-capable devices when pci_set_power_state is used.
 
 
-enable_wake
------------
-
-Usage:
-
-if (dev->driver && dev->driver->enable_wake)
-        dev->driver->enable_wake(dev,state,enable);
-
-This callback is generally only relevant for devices that support the PCI PM
-spec and have the ability to generate a PME# (Power Management Event Signal)
-to wake the system up. (However, it is possible that a device may support 
-some non-standard way of generating a wake event on sleep.)
-
-Bits 15:11 of the PMC (Power Mgmt Capabilities) Register in a device's
-PM Capabilities describe what power states the device supports generating a 
-wake event from:
-
-+------------------+
-|  Bit  |  State   |
-+------------------+
-|  11   |   D0     |
-|  12   |   D1     |
-|  13   |   D2     |
-|  14   |   D3hot  |
-|  15   |   D3cold |
-+------------------+
-
-A device can use this to enable wake events:
-
-         pci_enable_wake(dev,state,enable);
-
-Note that to enable PME# from D3cold, a value of 4 should be passed to 
-pci_enable_wake (since it uses an index into a bitmask). If a driver gets
-a request to enable wake events from D3, two calls should be made to 
-pci_enable_wake (one for both D3hot and D3cold).
-
 
 A reference implementation
 -------------------------
diff --git a/drivers/net/typhoon.c b/drivers/net/typhoon.c
index 15b2fb8aa492..0f2c0610ed71 100644
--- a/drivers/net/typhoon.c
+++ b/drivers/net/typhoon.c
@@ -2267,12 +2267,6 @@ need_resume:
         typhoon_resume(pdev);
         return -EBUSY;
 }
-
-static int
-typhoon_enable_wake(struct pci_dev *pdev, pci_power_t state, int enable)
-{
-        return pci_enable_wake(pdev, state, enable);
-}
 #endif
 
 static int __devinit
@@ -2636,7 +2630,6 @@ static struct pci_driver typhoon_driver = {
 #ifdef CONFIG_PM
         .suspend        = typhoon_suspend,
         .resume         = typhoon_resume,
-        .enable_wake    = typhoon_enable_wake,
 #endif
 };
 
diff --git a/drivers/net/wireless/hostap/hostap_pci.c b/drivers/net/wireless/hostap/hostap_pci.c
index 0cd48d151f5e..7da3664b8515 100644
--- a/drivers/net/wireless/hostap/hostap_pci.c
+++ b/drivers/net/wireless/hostap/hostap_pci.c
@@ -453,8 +453,6 @@ static struct pci_driver prism2_pci_drv_id = {
         .suspend        = prism2_pci_suspend,
         .resume         = prism2_pci_resume,
 #endif /* CONFIG_PM */
-        /* Linux 2.4.6 added save_state and enable_wake that are not used here
-         */
 };
 
 
diff --git a/drivers/net/wireless/hostap/hostap_plx.c b/drivers/net/wireless/hostap/hostap_plx.c
index 0183df757b3e..040dc3e36410 100644
--- a/drivers/net/wireless/hostap/hostap_plx.c
+++ b/drivers/net/wireless/hostap/hostap_plx.c
@@ -613,9 +613,6 @@ static struct pci_driver prism2_plx_drv_id = {
         .id_table       = prism2_plx_id_table,
         .probe          = prism2_plx_probe,
         .remove         = prism2_plx_remove,
-        .suspend        = NULL,
-        .resume         = NULL,
-        .enable_wake    = NULL
 };
 
 
diff --git a/drivers/net/wireless/prism54/islpci_hotplug.c b/drivers/net/wireless/prism54/islpci_hotplug.c
index 3dcb13bb7d57..25d6c80c9bab 100644
--- a/drivers/net/wireless/prism54/islpci_hotplug.c
+++ b/drivers/net/wireless/prism54/islpci_hotplug.c
@@ -87,7 +87,6 @@ static struct pci_driver prism54_driver = {
         .remove = prism54_remove,
         .suspend = prism54_suspend,
         .resume = prism54_resume,
-        /* .enable_wake ; we don't support this yet */
 };
 
 /******************************************************************************
diff --git a/drivers/scsi/nsp32.c b/drivers/scsi/nsp32.c
index f6f561d26bf0..3e9765f0281d 100644
--- a/drivers/scsi/nsp32.c
+++ b/drivers/scsi/nsp32.c
@@ -3487,15 +3487,6 @@ static int nsp32_resume(struct pci_dev *pdev)
         return 0;
 }
 
-/* Enable wake event */
-static int nsp32_enable_wake(struct pci_dev *pdev, pci_power_t state, int enable)
-{
-        struct Scsi_Host *host = pci_get_drvdata(pdev);
-
-        nsp32_msg(KERN_INFO, "pci-enable_wake: stub, pdev=0x%p, enable=%d, slot=%s, host=0x%p", pdev, enable, pci_name(pdev), host);
-
-        return 0;
-}
 #endif
 
 /************************************************************************
@@ -3571,7 +3562,6 @@ static struct pci_driver nsp32_driver = {
 #ifdef CONFIG_PM
         .suspend        = nsp32_suspend, 
         .resume         = nsp32_resume, 
-        .enable_wake    = nsp32_enable_wake,
 #endif
 };
 
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 4db7b5a18f58..5be420ac6303 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -371,7 +371,6 @@ struct pci_driver {
         int  (*suspend_late) (struct pci_dev *dev, pm_message_t state);
         int  (*resume_early) (struct pci_dev *dev);
         int  (*resume) (struct pci_dev *dev);                   /* Device woken up */
-        int  (*enable_wake) (struct pci_dev *dev, pci_power_t state, int enable);   /* Enable wake event */
         void (*shutdown) (struct pci_dev *dev);
 
         struct pci_error_handlers *err_handler;