Change the ordering of code in kernel/power/main.c so that device_suspend() is called before disable_nonboot_cpus() and pm_ops->finish() is called after enable_nonboot_cpus() and before device_resume(), as indicated by recent discussion on Linux-PM (cf. http://lists.osdl.org/pipermail/linux-pm/2006-November/004164.html). Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx> --- kernel/power/main.c | 34 +++++++++++++++++++--------------- 1 file changed, 19 insertions(+), 15 deletions(-) Index: linux-2.6.20-rc1/kernel/power/main.c =================================================================== --- linux-2.6.20-rc1.orig/kernel/power/main.c 2006-12-14 22:35:52.000000000 +0100 +++ linux-2.6.20-rc1/kernel/power/main.c 2006-12-14 23:19:32.000000000 +0100 @@ -43,6 +43,11 @@ void pm_set_ops(struct pm_ops * ops) mutex_unlock(&pm_mutex); } +static inline void pm_finish(suspend_state_t state) +{ + if (pm_ops->finish) + pm_ops->finish(state); +} /** * suspend_prepare - Do prep work before entering low-power state. @@ -63,10 +68,6 @@ static int suspend_prepare(suspend_state pm_prepare_console(); - error = disable_nonboot_cpus(); - if (error) - goto Enable_cpu; - if (freeze_processes()) { error = -EAGAIN; goto Thaw; @@ -88,18 +89,22 @@ static int suspend_prepare(suspend_state } suspend_console(); - if ((error = device_suspend(PMSG_SUSPEND))) { + error = device_suspend(PMSG_SUSPEND); + if (error) { printk(KERN_ERR "Some devices failed to suspend\n"); - goto Finish; + goto Resume_devices; } - return 0; - Finish: - if (pm_ops->finish) - pm_ops->finish(state); + error = disable_nonboot_cpus(); + if (!error) + return 0; + + enable_nonboot_cpus(); + Resume_devices: + pm_finish(state); + device_resume(); + resume_console(); Thaw: thaw_processes(); - Enable_cpu: - enable_nonboot_cpus(); pm_restore_console(); return error; } @@ -134,12 +139,11 @@ int suspend_enter(suspend_state_t state) static void suspend_finish(suspend_state_t state) { + enable_nonboot_cpus(); + pm_finish(state); device_resume(); resume_console(); thaw_processes(); - enable_nonboot_cpus(); - if (pm_ops && pm_ops->finish) - pm_ops->finish(state); pm_restore_console(); } - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html