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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2007-07-01 12:07:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-01 12:29:44 -0700 |
| commit | 2391dae3e36c19fe668c71eac2eb8344dbaaf46d (patch) | |
| tree | ae8c1fa53fe67e3ccbb8c5097f6b5bda27b26959 /kernel/power | |
| parent | cbcdd772ff43de58cc0d9de76ae9d05e2dd98bc0 (diff) | |
| download | linux-2391dae3e36c19fe668c71eac2eb8344dbaaf46d.tar.bz2 | |
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 'kernel/power')
| -rw-r--r-- | kernel/power/main.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/kernel/power/main.c b/kernel/power/main.c index 8812985f3029..fc45ed22620f 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -15,7 +15,6 @@ #include <linux/delay.h> #include <linux/errno.h> #include <linux/init.h> -#include <linux/pm.h> #include <linux/console.h> #include <linux/cpu.h> #include <linux/resume-trace.h> @@ -97,6 +96,11 @@ static int suspend_prepare(suspend_state_t state) } } + if (pm_ops->set_target) { + error = pm_ops->set_target(state); + if (error) + goto Thaw; + } suspend_console(); error = device_suspend(PMSG_SUSPEND); if (error) { |