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authorJohannes Berg <johannes@sipsolutions.net>2007-04-30 15:09:54 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-04-30 16:40:40 -0700
commite8c9c502690efd24b7055bf608e7a3c34216848b (patch)
tree1583f34ec9cac07ddfdcb24de66e49718b107436
parent11d77d0c01b80e44c7aceb21928508dafce774f9 (diff)
downloadlinux-2.6.34-ux500-e8c9c502690efd24b7055bf608e7a3c34216848b.tar.gz
power management: implement pm_ops.valid for everybody
Almost all users of pm_ops only support mem sleep, don't check in .valid and don't reject any others in .prepare so users can be confused if they check /sys/power/state, especially when new states are added (these would then result in s-t-r although they're supposed to be something different). This patch implements a generic pm_valid_only_mem function that is then exported for users and puts it to use in almost all existing pm_ops. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: David Brownell <david-b@pacbell.net> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: linux-pm@lists.linux-foundation.org Cc: Len Brown <lenb@kernel.org> Acked-by: Russell King <rmk@arm.linux.org.uk> Cc: Greg KH <greg@kroah.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/arm/common/sharpsl_pm.c1
-rw-r--r--arch/arm/mach-omap1/pm.c1
-rw-r--r--arch/arm/mach-omap2/pm.c1
-rw-r--r--arch/arm/mach-pnx4008/pm.c39
-rw-r--r--arch/arm/mach-pxa/pm.c1
-rw-r--r--arch/arm/mach-sa1100/pm.c1
-rw-r--r--arch/arm/plat-s3c24xx/pm.c19
-rw-r--r--arch/sh/boards/hp6xx/pm.c1
-rw-r--r--drivers/acpi/sleep/main.c13
-rw-r--r--include/linux/pm.h4
-rw-r--r--kernel/power/main.c13
11 files changed, 39 insertions, 55 deletions
diff --git a/arch/arm/common/sharpsl_pm.c b/arch/arm/common/sharpsl_pm.c
index 4cb895d4ae5..5972df2b9af 100644
--- a/arch/arm/common/sharpsl_pm.c
+++ b/arch/arm/common/sharpsl_pm.c
@@ -769,6 +769,7 @@ static struct pm_ops sharpsl_pm_ops = {
.prepare = pxa_pm_prepare,
.enter = corgi_pxa_pm_enter,
.finish = pxa_pm_finish,
+ .valid = pm_valid_only_mem,
};
static int __init sharpsl_pm_probe(struct platform_device *pdev)
diff --git a/arch/arm/mach-omap1/pm.c b/arch/arm/mach-omap1/pm.c
index 4248117e5e3..0383ab33427 100644
--- a/arch/arm/mach-omap1/pm.c
+++ b/arch/arm/mach-omap1/pm.c
@@ -701,6 +701,7 @@ static struct pm_ops omap_pm_ops ={
.prepare = omap_pm_prepare,
.enter = omap_pm_enter,
.finish = omap_pm_finish,
+ .valid = pm_valid_only_mem,
};
static int __init omap_pm_init(void)
diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c
index 3e9a128feea..6f4a5436d0c 100644
--- a/arch/arm/mach-omap2/pm.c
+++ b/arch/arm/mach-omap2/pm.c
@@ -373,6 +373,7 @@ static struct pm_ops omap_pm_ops = {
.prepare = omap2_pm_prepare,
.enter = omap2_pm_enter,
.finish = omap2_pm_finish,
+ .valid = pm_valid_only_mem,
};
int __init omap2_pm_init(void)
diff --git a/arch/arm/mach-pnx4008/pm.c b/arch/arm/mach-pnx4008/pm.c
index 3649cd3dfc9..2a137f33f75 100644
--- a/arch/arm/mach-pnx4008/pm.c
+++ b/arch/arm/mach-pnx4008/pm.c
@@ -107,50 +107,19 @@ static int pnx4008_pm_enter(suspend_state_t state)
case PM_SUSPEND_MEM:
pnx4008_suspend();
break;
- case PM_SUSPEND_DISK:
- return -ENOTSUPP;
- default:
- return -EINVAL;
}
return 0;
}
-/*
- * Called after processes are frozen, but before we shut down devices.
- */
-static int pnx4008_pm_prepare(suspend_state_t state)
-{
- switch (state) {
- case PM_SUSPEND_STANDBY:
- case PM_SUSPEND_MEM:
- break;
-
- case PM_SUSPEND_DISK:
- return -ENOTSUPP;
- break;
-
- default:
- return -EINVAL;
- break;
- }
- return 0;
-}
-
-/*
- * Called after devices are re-setup, but before processes are thawed.
- */
-static int pnx4008_pm_finish(suspend_state_t state)
+static int pnx4008_pm_valid(suspend_state_t state)
{
- return 0;
+ return (state == PM_SUSPEND_STANDBY) ||
+ (state == PM_SUSPEND_MEM);
}
-/*
- * Set to PM_DISK_FIRMWARE so we can quickly veto suspend-to-disk.
- */
static struct pm_ops pnx4008_pm_ops = {
- .prepare = pnx4008_pm_prepare,
.enter = pnx4008_pm_enter,
- .finish = pnx4008_pm_finish,
+ .valid = pnx4008_pm_valid,
};
static int __init pnx4008_pm_init(void)
diff --git a/arch/arm/mach-pxa/pm.c b/arch/arm/mach-pxa/pm.c
index 0a99ef43b36..6bf15ae7384 100644
--- a/arch/arm/mach-pxa/pm.c
+++ b/arch/arm/mach-pxa/pm.c
@@ -227,6 +227,7 @@ static struct pm_ops pxa_pm_ops = {
.prepare = pxa_pm_prepare,
.enter = pxa_pm_enter,
.finish = pxa_pm_finish,
+ .valid = pm_valid_only_mem,
};
static int __init pxa_pm_init(void)
diff --git a/arch/arm/mach-sa1100/pm.c b/arch/arm/mach-sa1100/pm.c
index b0837113b2a..d674cf34315 100644
--- a/arch/arm/mach-sa1100/pm.c
+++ b/arch/arm/mach-sa1100/pm.c
@@ -133,6 +133,7 @@ unsigned long sleep_phys_sp(void *sp)
static struct pm_ops sa11x0_pm_ops = {
.enter = sa11x0_pm_enter,
+ .valid = pm_valid_only_mem,
};
static int __init sa11x0_pm_init(void)
diff --git a/arch/arm/plat-s3c24xx/pm.c b/arch/arm/plat-s3c24xx/pm.c
index d6af3082af3..c6b03f8ab26 100644
--- a/arch/arm/plat-s3c24xx/pm.c
+++ b/arch/arm/plat-s3c24xx/pm.c
@@ -612,26 +612,9 @@ static int s3c2410_pm_enter(suspend_state_t state)
return 0;
}
-/*
- * Called after processes are frozen, but before we shut down devices.
- */
-static int s3c2410_pm_prepare(suspend_state_t state)
-{
- return 0;
-}
-
-/*
- * Called after devices are re-setup, but before processes are thawed.
- */
-static int s3c2410_pm_finish(suspend_state_t state)
-{
- return 0;
-}
-
static struct pm_ops s3c2410_pm_ops = {
- .prepare = s3c2410_pm_prepare,
.enter = s3c2410_pm_enter,
- .finish = s3c2410_pm_finish,
+ .valid = pm_valid_only_mem,
};
/* s3c2410_pm_init
diff --git a/arch/sh/boards/hp6xx/pm.c b/arch/sh/boards/hp6xx/pm.c
index 4b2f29a4bde..8143d1b948e 100644
--- a/arch/sh/boards/hp6xx/pm.c
+++ b/arch/sh/boards/hp6xx/pm.c
@@ -69,6 +69,7 @@ static int hp6x0_pm_enter(suspend_state_t state)
static struct pm_ops hp6x0_pm_ops = {
.enter = hp6x0_pm_enter,
+ .valid = pm_valid_only_mem,
};
static int __init hp6x0_pm_init(void)
diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c
index 37a0930fc0a..f8c63410bcb 100644
--- a/drivers/acpi/sleep/main.c
+++ b/drivers/acpi/sleep/main.c
@@ -168,9 +168,18 @@ int acpi_suspend(u32 acpi_state)
static int acpi_pm_state_valid(suspend_state_t pm_state)
{
- u32 acpi_state = acpi_suspend_states[pm_state];
+ u32 acpi_state;
+
+ switch (pm_state) {
+ case PM_SUSPEND_ON:
+ case PM_SUSPEND_STANDBY:
+ case PM_SUSPEND_MEM:
+ acpi_state = acpi_suspend_states[pm_state];
- return sleep_states[acpi_state];
+ return sleep_states[acpi_state];
+ default:
+ return 0;
+ }
}
static struct pm_ops acpi_pm_ops = {
diff --git a/include/linux/pm.h b/include/linux/pm.h
index c2a55f94c29..6035209cf31 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -128,6 +128,9 @@ typedef int __bitwise suspend_disk_method_t;
* always valid and never passed to this call.
* If not assigned, all suspend states are advertised as valid
* in /sys/power/state (but can still be rejected by prepare or enter.)
+ * Since new states can be added for other platforms, you should
+ * assign this callback. There is a %pm_valid_only_mem function
+ * available if you only implemented mem sleep.
*
* @prepare: Prepare the platform for the given suspend state. Can return a
* negative error code if necessary.
@@ -165,6 +168,7 @@ extern void pm_set_ops(struct pm_ops *pm_ops);
extern struct pm_ops *pm_ops;
extern int pm_suspend(suspend_state_t state);
+extern int pm_valid_only_mem(suspend_state_t state);
/**
* arch_suspend_disable_irqs - disable IRQs for suspend
diff --git a/kernel/power/main.c b/kernel/power/main.c
index 053c0a7d7f5..f94f4e20115 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -48,6 +48,19 @@ void pm_set_ops(struct pm_ops * ops)
mutex_unlock(&pm_mutex);
}
+/**
+ * pm_valid_only_mem - generic memory-only valid callback
+ *
+ * pm_ops drivers that implement mem suspend only and only need
+ * to check for that in their .valid callback can use this instead
+ * of rolling their own .valid callback.
+ */
+int pm_valid_only_mem(suspend_state_t state)
+{
+ return state == PM_SUSPEND_MEM;
+}
+
+
static inline void pm_finish(suspend_state_t state)
{
if (pm_ops->finish)