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>
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index d281201..74801f7 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -759,3 +759,24 @@
{
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 4db261e..aee73cf 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1933,6 +1933,9 @@
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 b205ab8..9de87e9 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -98,9 +98,11 @@
#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