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[PATCH] Driver Core: remove driver model detach_state

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The driver model has a "detach_state" mechanism that:

 - Has never been used by any in-kernel drive;
 - Is superfluous, since driver remove() methods can do the same thing;
 - Became buggy when the suspend() parameter changed semantics and type;
 - Could self-deadlock when called from certain suspend contexts;
 - Is effectively wasted documentation, object code, and headspace.

This removes that "detach_state" mechanism; net code shrink, as well
as a per-device saving in the driver model and sysfs.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
David Brownell
2005-05-12 12:06:27 -07:00
committed by Greg KH
parent 82428b62aa
commit 0b405a0f7e
10 changed files with 5 additions and 113 deletions
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16
drivers/base/power/shutdown.c
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@@ -19,22 +19,6 @@
extern struct subsystem devices_subsys;
int device_detach_shutdown(struct device * dev)
{
if (!dev->detach_state)
return 0;
if (dev->detach_state == DEVICE_PM_OFF) {
if (dev->driver && dev->driver->shutdown) {
dev_dbg(dev, "shutdown\n");
dev->driver->shutdown(dev);
}
return 0;
}
return dpm_runtime_suspend(dev, dev->detach_state);
}
/**
* We handle system devices differently - we suspend and shut them
* down last and resume them first. That way, we don't do anything stupid like