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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2007-07-01 23:07:33 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-01 23:29:44 +0400 |
| commit | 2391dae3e36c19fe668c71eac2eb8344dbaaf46d (patch) | |
| tree | ae8c1fa53fe67e3ccbb8c5097f6b5bda27b26959 /arch | |
| parent | cbcdd772ff43de58cc0d9de76ae9d05e2dd98bc0 (diff) | |
| download | linux-2391dae3e36c19fe668c71eac2eb8344dbaaf46d.tar.xz | |
PM: introduce set_target method in pm_ops
Commit 52ade9b3b97fd3bea42842a056fe0786c28d0555 changed the suspend code
ordering to execute pm_ops->prepare() after the device model per-device
.suspend() calls in order to fix some ACPI-related issues. Unfortunately, it
broke the at91 platform which assumed that pm_ops->prepare() would be called
before suspending devices.
at91 used pm_ops->prepare() to get notified of the target system sleep state,
so that it could use this information while suspending devices. However, with
the current suspend code ordering pm_ops->prepare() is called too late for
this purpose. Thus, at91 needs an additional method in 'struct pm_ops' that
will be used for notifying the platform of the target system sleep state.
Moreover, in the future such a method will also be needed by ACPI.
This patch adds the .set_target() method to 'struct pm_ops' and makes the
suspend code call it, if implemented, before executing the device model
per-device .suspend() calls. It also modifies the at91 code to use
pm_ops->set_target() instead of pm_ops->prepare().
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Len Brown <lenb@kernel.org>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-at91/pm.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c index 47ff676aca5f..ddf9184d561d 100644 --- a/arch/arm/mach-at91/pm.c +++ b/arch/arm/mach-at91/pm.c @@ -53,7 +53,7 @@ static suspend_state_t target_state; /* * Called after processes are frozen, but before we shutdown devices. */ -static int at91_pm_prepare(suspend_state_t state) +static int at91_pm_set_target(suspend_state_t state) { target_state = state; return 0; @@ -201,7 +201,7 @@ error: static struct pm_ops at91_pm_ops ={ .valid = at91_pm_valid_state, - .prepare = at91_pm_prepare, + .set_target = at91_pm_set_target, .enter = at91_pm_enter, }; |