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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2011-03-15 02:43:46 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2011-03-15 02:43:46 +0300 |
| commit | 40dc166cb5dddbd36aa4ad11c03915ea538f5a61 (patch) | |
| tree | 0a778159cf89ddee9e7d3134ae40569bdccd2a24 /kernel/power/suspend.c | |
| parent | f9b9e806ae0ede772cbb9916d9ac7354a123d044 (diff) | |
| download | linux-40dc166cb5dddbd36aa4ad11c03915ea538f5a61.tar.xz | |
PM / Core: Introduce struct syscore_ops for core subsystems PM
Some subsystems need to carry out suspend/resume and shutdown
operations with one CPU on-line and interrupts disabled. The only
way to register such operations is to define a sysdev class and
a sysdev specifically for this purpose which is cumbersome and
inefficient. Moreover, the arguments taken by sysdev suspend,
resume and shutdown callbacks are practically never necessary.
For this reason, introduce a simpler interface allowing subsystems
to register operations to be executed very late during system suspend
and shutdown and very early during resume in the form of
strcut syscore_ops objects.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'kernel/power/suspend.c')
| -rw-r--r-- | kernel/power/suspend.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c index de6f86bfa303..2814c32aed51 100644 --- a/kernel/power/suspend.c +++ b/kernel/power/suspend.c @@ -22,6 +22,7 @@ #include <linux/mm.h> #include <linux/slab.h> #include <linux/suspend.h> +#include <linux/syscore_ops.h> #include <trace/events/power.h> #include "power.h" @@ -163,11 +164,14 @@ static int suspend_enter(suspend_state_t state) BUG_ON(!irqs_disabled()); error = sysdev_suspend(PMSG_SUSPEND); + if (!error) + error = syscore_suspend(); if (!error) { if (!(suspend_test(TEST_CORE) || pm_wakeup_pending())) { error = suspend_ops->enter(state); events_check_enabled = false; } + syscore_resume(); sysdev_resume(); } |