From d389fec6a2aec1ea7d47833f36a0413a619c8c12 Mon Sep 17 00:00:00 2001
From: Taku Izumi <izumi.taku@jp.fujitsu.com>
Date: Fri, 17 Oct 2008 13:52:51 +0900
Subject: ACPI/PCI: Set support bit for MSI in support field of _OSC

Currently linux doesn't have any code to set the "MSI supported" bit in
Support Fireld of _OSC. This patch adds the code for that.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
---
 drivers/pci/msi.c | 21 +++++++++++++++++++++
 drivers/pci/pci.c |  3 +++
 drivers/pci/pci.h |  2 ++
 3 files changed, 26 insertions(+)

(limited to 'drivers/pci')

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index d2812013fd2..74801f7df9c 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -759,3 +759,24 @@ void pci_msi_init_pci_dev(struct pci_dev *dev)
 {
 	INIT_LIST_HEAD(&dev->msi_list);
 }
+
+#ifdef CONFIG_ACPI
+#include <linux/acpi.h>
+#include <linux/pci-acpi.h>
+static void __devinit msi_acpi_init(void)
+{
+	if (acpi_pci_disabled)
+		return;
+	pci_osc_support_set(OSC_MSI_SUPPORT);
+	pcie_osc_support_set(OSC_MSI_SUPPORT);
+}
+#else
+static inline void msi_acpi_init(void) { }
+#endif /* CONFIG_ACPI */
+
+void __devinit msi_init(void)
+{
+	if (!pci_msi_enable)
+		return;
+	msi_acpi_init();
+}
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 4db261e13e6..aee73cf251b 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1933,6 +1933,9 @@ static int __devinit pci_init(void)
 	while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
 		pci_fixup_device(pci_fixup_final, dev);
 	}
+
+	msi_init();
+
 	return 0;
 }
 
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index b205ab866a1..9de87e9f98f 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -98,9 +98,11 @@ extern unsigned int pci_pm_d3_delay;
 #ifdef CONFIG_PCI_MSI
 void pci_no_msi(void);
 extern void pci_msi_init_pci_dev(struct pci_dev *dev);
+extern void __devinit msi_init(void);
 #else
 static inline void pci_no_msi(void) { }
 static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
+static inline void msi_init(void) { }
 #endif
 
 #ifdef CONFIG_PCIEAER
-- 
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