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[PATCH] PowerMac: force only suspend-to-disk to be valid 

For a very long time, echoing 'standby' or 'mem' into /sys/power/state has
killed the machine on powerpc.  This patch fixes that.

This patch adds the .valid callback to pm_ops on PowerMac so that only the
suspend to disk state can be entered.  Note that just returning 0 would
suffice since the upper layers don't pass PM_SUSPEND_DISK down, but we
handle it there regardless just in case that changes.

Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Johannes Berg 2006-05-25 18:44:24 -07:00 committed by Linus Torvalds
parent 3ac8141366
commit 0fba3a1f39
1 changed files with 12 additions and 0 deletions
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12
arch/powerpc/platforms/powermac/setup.c
View File

@ -463,11 +463,23 @@ static int pmac_pm_finish(suspend_state_t state)
return 0;
}
static int pmac_pm_valid(suspend_state_t state)
{
switch (state) {
case PM_SUSPEND_DISK:
return 1;
/* can't do any other states via generic mechanism yet */
default:
return 0;
}
}
static struct pm_ops pmac_pm_ops = {
.pm_disk_mode = PM_DISK_SHUTDOWN,
.prepare = pmac_pm_prepare,
.enter = pmac_pm_enter,
.finish = pmac_pm_finish,
.valid = pmac_pm_valid,
};
#endif /* CONFIG_SOFTWARE_SUSPEND */