linux-kernel - [RFC PATCH 2/3] ACPI: enable ACPI SCI during suspend

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Message-Id: <1359300060-2967-2-git-send-email-rui.zhang@intel.com>
Date:	Sun, 27 Jan 2013 23:20:59 +0800
From:	Zhang Rui <rui.zhang@...el.com>
To:	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-acpi@...r.kernel.org, intel-gfx@...ts.freedesktop.org
Cc:	rjw@...k.pl, lenb@...nel.org, Zhang Rui <rui.zhang@...el.com>
Subject: [RFC PATCH 2/3] ACPI: enable ACPI SCI during suspend

Enable ACPI SCI during suspend so that SCI can be used
as wake events for PM_SUSPEND_FREEZE.

For S3/S4 transition,
We disable all GPEs in suspend_ops->prepare_late() to
fix a problem that GPEs may trigger SCI  before
arch_suspend_disable_irqs() is run.
So it is safe to leave the SCI enabled until
arch_suspend_irq_disable() is run.

Signed-off-by: Zhang Rui <rui.zhang@...el.com>
---
 drivers/acpi/osl.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 3ff2678..3adeb10 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -787,7 +787,7 @@ acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
 
 	acpi_irq_handler = handler;
 	acpi_irq_context = context;
-	if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
+	if (request_irq(irq, acpi_irq, IRQF_SHARED | IRQF_NO_SUSPEND, "acpi", acpi_irq)) {
 		printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
 		acpi_irq_handler = NULL;
 		return AE_NOT_ACQUIRED;
-- 
1.7.9.5

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