linux-kernel - Re: Suspend to ram with 2.6 kernels

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Date:	Tue, 12 Sep 2006 00:59:20 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Andreas Steinmetz <ast@...dv.de>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, Pavel Machek <pavel@...e.cz>,
	Eric Sandall <eric@...dall.us>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Suspend to ram with 2.6 kernels

On Tue, Sep 12, 2006 at 12:28:20AM +0200, Andreas Steinmetz wrote:

> Nope,
> but the hint from this thread was good: s2ram works with
> "acpi_skip_timer_override" and probably "enable_timer_pin_1" (I have to
> try without this one, yet). Radeon, however, remains as a problem.

Can you test with the following patch (without 
acpi_skip_timer_override)?

diff --git a/arch/i386/kernel/i8259.c b/arch/i386/kernel/i8259.c
index 323ef8a..41485c7 100644
--- a/arch/i386/kernel/i8259.c
+++ b/arch/i386/kernel/i8259.c
@@ -46,6 +46,8 @@ static void end_8259A_irq (unsigned int 
 
 #define shutdown_8259A_irq	disable_8259A_irq
 
+static int i8259A_auto_eoi;
+
 static void mask_and_ack_8259A(unsigned int);
 
 unsigned int startup_8259A_irq(unsigned int irq)
@@ -254,7 +256,7 @@ static void save_ELCR(char *trigger)
 
 static int i8259A_resume(struct sys_device *dev)
 {
-	init_8259A(0);
+	init_8259A(i8259A_auto_eoi);
 	restore_ELCR(irq_trigger);
 	return 0;
 }
@@ -302,6 +304,8 @@ void init_8259A(int auto_eoi)
 {
 	unsigned long flags;
 
+	i8259A_auto_eoi = auto_eoi;
+	
 	spin_lock_irqsave(&i8259A_lock, flags);
 
 	outb(0xff, PIC_MASTER_IMR);	/* mask all of 8259A-1 */
diff --git a/arch/x86_64/kernel/i8259.c b/arch/x86_64/kernel/i8259.c
index 5ecd34a..75f77da 100644
--- a/arch/x86_64/kernel/i8259.c
+++ b/arch/x86_64/kernel/i8259.c
@@ -129,6 +129,8 @@ #undef IRQLIST_14
 
 DEFINE_SPINLOCK(i8259A_lock);
 
+static int i8259A_auto_eoi;
+
 static void end_8259A_irq (unsigned int irq)
 {
 	if (irq > 256) { 
@@ -342,6 +344,8 @@ void init_8259A(int auto_eoi)
 {
 	unsigned long flags;
 
+	i8259A_auto_eoi = auto_eoi;
+
 	spin_lock_irqsave(&i8259A_lock, flags);
 
 	outb(0xff, 0x21);	/* mask all of 8259A-1 */
@@ -400,7 +404,7 @@ static void save_ELCR(char *trigger)
 
 static int i8259A_resume(struct sys_device *dev)
 {
-	init_8259A(0);
+	init_8259A(i8259A_auto_eoi);
 	restore_ELCR(irq_trigger);
 	return 0;
 }

-- 
Matthew Garrett | mjg59@...f.ucam.org
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