From e2a5b420f716cd1a46674b1a90389612eced916f Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Fri, 18 Mar 2005 16:20:46 -0500 Subject: [ACPI] ACPI poweroff fix Register an "acpi" system device to be notified of shutdown preparation. This depends on CONFIG_PM http://bugzilla.kernel.org/show_bug.cgi?id=4041 Signed-off-by: Alexey Starikovskiy Signed-off-by: Andrew Morton Signed-off-by: Len Brown --- kernel/power/main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel') diff --git a/kernel/power/main.c b/kernel/power/main.c index 4cdebc972ff2..c7eb4a833db5 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -190,7 +190,7 @@ int software_suspend(void) int pm_suspend(suspend_state_t state) { - if (state > PM_SUSPEND_ON && state < PM_SUSPEND_MAX) + if (state > PM_SUSPEND_ON && state <= PM_SUSPEND_MAX) return enter_state(state); return -EINVAL; } -- cgit v1.2.3 From 5ae947ecc9c1c23834201e5321684a5cb68bdd3f Mon Sep 17 00:00:00 2001 From: David Shaohua Li Date: Fri, 18 Mar 2005 16:27:13 -0500 Subject: [ACPI] Suspend to RAM fix Free some RAM before entering S3 so that upon resume we can be sure early allocations will succeed. http://bugzilla.kernel.org/show_bug.cgi?id=3469 Signed-off-by: David Shaohua Li Signed-off-by: Len Brown --- kernel/power/main.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'kernel') diff --git a/kernel/power/main.c b/kernel/power/main.c index c7eb4a833db5..454434716f35 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -19,6 +19,9 @@ #include "power.h" +/*This is just an arbitrary number */ +#define FREE_PAGE_NUMBER (100) + DECLARE_MUTEX(pm_sem); struct pm_ops * pm_ops = NULL; @@ -49,6 +52,7 @@ void pm_set_ops(struct pm_ops * ops) static int suspend_prepare(suspend_state_t state) { int error = 0; + unsigned int free_pages; if (!pm_ops || !pm_ops->enter) return -EPERM; @@ -60,6 +64,16 @@ static int suspend_prepare(suspend_state_t state) goto Thaw; } + if ((free_pages = nr_free_pages()) < FREE_PAGE_NUMBER) { + pr_debug("PM: free some memory\n"); + shrink_all_memory(FREE_PAGE_NUMBER - free_pages); + if (nr_free_pages() < FREE_PAGE_NUMBER) { + error = -ENOMEM; + printk(KERN_ERR "PM: No enough memory\n"); + goto Thaw; + } + } + if (pm_ops->prepare) { if ((error = pm_ops->prepare(state))) goto Thaw; -- cgit v1.2.3