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Date: Mon, 7 May 2007 09:29:04 -0700
From: David Brownell <david-b@...bell.net>
To: Greg KH <greg@...e.de>
Cc: Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: [patch 2.6.21-git] 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@...rs.sourceforge.net>
---
Documentation/pci.txt | 3 --
Documentation/power/pci.txt | 37 --------------------------
drivers/net/typhoon.c | 7 ----
drivers/net/wireless/hostap/hostap_pci.c | 2 -
drivers/net/wireless/hostap/hostap_plx.c | 3 --
drivers/net/wireless/prism54/islpci_hotplug.c | 1
drivers/scsi/nsp32.c | 10 -------
include/linux/pci.h | 1
8 files changed, 64 deletions(-)
--- g26.orig/include/linux/pci.h 2007-05-06 08:28:03.000000000 -0700
+++ g26/include/linux/pci.h 2007-05-06 09:42:55.000000000 -0700
@@ -370,7 +370,6 @@ 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;
--- g26.orig/Documentation/pci.txt 2007-05-06 08:27:40.000000000 -0700
+++ g26/Documentation/pci.txt 2007-05-06 09:42:55.000000000 -0700
@@ -113,9 +113,6 @@ initialization with a pointer to a struc
(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
--- g26.orig/Documentation/power/pci.txt 2007-05-06 08:27:40.000000000 -0700
+++ g26/Documentation/power/pci.txt 2007-05-06 09:42:55.000000000 -0700
@@ -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_sta
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
-------------------------
--- g26.orig/drivers/net/typhoon.c 2007-05-06 02:56:38.000000000 -0700
+++ g26/drivers/net/typhoon.c 2007-05-06 09:42:55.000000000 -0700
@@ -2276,12 +2276,6 @@ 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
@@ -2645,7 +2639,6 @@ static struct pci_driver typhoon_driver
#ifdef CONFIG_PM
.suspend = typhoon_suspend,
.resume = typhoon_resume,
- .enable_wake = typhoon_enable_wake,
#endif
};
--- g26.orig/drivers/net/wireless/hostap/hostap_pci.c 2007-05-06 02:56:38.000000000 -0700
+++ g26/drivers/net/wireless/hostap/hostap_pci.c 2007-05-06 09:43:45.000000000 -0700
@@ -455,8 +455,6 @@ static struct pci_driver prism2_pci_drv_
.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
- */
};
--- g26.orig/drivers/net/wireless/hostap/hostap_plx.c 2007-05-06 02:56:38.000000000 -0700
+++ g26/drivers/net/wireless/hostap/hostap_plx.c 2007-05-06 09:43:50.000000000 -0700
@@ -615,9 +615,6 @@ static struct pci_driver prism2_plx_drv_
.id_table = prism2_plx_id_table,
.probe = prism2_plx_probe,
.remove = prism2_plx_remove,
- .suspend = NULL,
- .resume = NULL,
- .enable_wake = NULL
};
--- g26.orig/drivers/net/wireless/prism54/islpci_hotplug.c 2007-05-06 02:56:38.000000000 -0700
+++ g26/drivers/net/wireless/prism54/islpci_hotplug.c 2007-05-06 09:42:55.000000000 -0700
@@ -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 */
};
/******************************************************************************
--- g26.orig/drivers/scsi/nsp32.c 2007-05-06 02:56:39.000000000 -0700
+++ g26/drivers/scsi/nsp32.c 2007-05-06 09:42:55.000000000 -0700
@@ -3487,15 +3487,6 @@ static int nsp32_resume(struct pci_dev *
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
};
-
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