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

[Pavel Machek]

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:
								Pavel

--- clean/kernel/power/swsusp.c	2004-10-19 14:16:29.000000000 +0200
+++ linux/kernel/power/swsusp.c	2004-11-23 23:11:04.000000000 +0100
@@ -854,11 +840,13 @@
 	if ((error = arch_prepare_suspend()))
 		return error;
 	local_irq_disable();
+	sysdev_suspend(3);
 	save_processor_state();
 	error = swsusp_arch_suspend();
 	/* Restore control flow magically appears here */
 	restore_processor_state();
 	restore_highmem();
+	sysdev_resume();
 	local_irq_enable();
 	return error;
 }
@@ -878,6 +866,7 @@
 {
 	int error;
 	local_irq_disable();
+	sysdev_suspend(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();
+	sysdev_resume();
 	local_irq_enable();
 	return error;
 }




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