ACPI/PCI: PCI MSI _OSC support capabilities called when root bridge added

The _OSC capability OSC_MSI_SUPPORT is set when the root bridge is added
with pci_acpi_osc_support(), so we no longer need to do it in the PCI
MSI driver.  Also adds the function pci_msi_enabled, which returns true
if pci=nomsi is not on the kernel command-line.

Signed-off-by: Andrew Patterson <andrew.patterson@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 9fe026b1c9d0..5b38a026d122 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -350,6 +350,8 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
         if (pcie_aspm_enabled())
                 flags |= OSC_ACTIVE_STATE_PWR_SUPPORT |
                         OSC_CLOCK_PWR_CAPABILITY_SUPPORT;
+        if (pci_msi_enabled())
+                flags |= OSC_MSI_SUPPORT;
         if (flags != base_flags)
                 pci_acpi_osc_support(device->handle, flags);