Re: [linux-pm] [PATCH] make pm_suspend_disk suspend/resume sysdev and dpm_off_irq

[Pavel Machek <pavel@ucw.cz>]

Hi!

> >> This patch makes the new swsusp code ( pm_suspend_disk since
> >> 2.6.9-rc3) call suspend/resume functions for sysdev and devices in
> >> dpm_off_irq list. Otherwise, PCI link device in the system won't
> >> provide correct interrupt for PCI devices during resume.
> > 
> > I do not think this is right approach; you enable interrupts
> > then disable that again, potentially without interrupt controller
> > being initialized. 
> > 
> > This should be better patch:
> 
> Agreed. Your patch solves the bug. But do you plan to deal with the 
> devices in dpm_off_irq list?

Okay, this should be better patch. It works here.

								Pavel

--- clean/kernel/power/swsusp.c	2004-10-19 14:16:29.000000000 +0200
+++ linux/kernel/power/swsusp.c	2004-11-25 12:27:35.000000000 +0100
@@ -854,11 +840,13 @@
 	if ((error = arch_prepare_suspend()))
 		return error;
 	local_irq_disable();
+	device_power_down(3);
 	save_processor_state();
 	error = swsusp_arch_suspend();
 	/* Restore control flow magically appears here */
 	restore_processor_state();
 	restore_highmem();
+	device_power_up();
 	local_irq_enable();
 	return error;
 }
@@ -878,6 +866,7 @@
 {
 	int error;
 	local_irq_disable();
+	device_power_down(3);
 	/* We'll ignore saved state, but this gets preempt count (etc) right */
 	save_processor_state();
 	error = swsusp_arch_resume();
@@ -887,6 +876,7 @@
 	BUG_ON(!error);
 	restore_processor_state();
 	restore_highmem();
+	device_power_up();
 	local_irq_enable();
 	return error;
 }

-- 
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