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SubjectRe: 2.6.38 regression caused by commit 415e12b
Date
On Wednesday, March 02, 2011, Sarah Sharp wrote:
> On Wed, Mar 02, 2011 at 12:30:16AM +0100, Rafael J. Wysocki wrote:
> > On Tuesday, March 01, 2011, Sarah Sharp wrote:
> > > On Tue, Mar 01, 2011 at 09:55:33PM +0100, Rafael J. Wysocki wrote:
> > > > Please check if the appended patch (on top of the Linus' current) helps.
> > >
> > > Sorry, it doesn't help. Same message as before.
> >
> > Can you send dmesg with the patch applied, please?
>
> Attached.

Something's fishy. Evidently, _OSC is not executed on your system
although it should be with the patch.

Please try the patch below instead and send dmesg (either way).

Thanks,
Rafael

---
drivers/acpi/pci_root.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)

Index: linux-2.6/drivers/acpi/pci_root.c
===================================================================
--- linux-2.6.orig/drivers/acpi/pci_root.c
+++ linux-2.6/drivers/acpi/pci_root.c
@@ -48,10 +48,7 @@ static int acpi_pci_root_add(struct acpi
static int acpi_pci_root_remove(struct acpi_device *device, int type);
static int acpi_pci_root_start(struct acpi_device *device);

-#define ACPI_PCIE_REQ_SUPPORT (OSC_EXT_PCI_CONFIG_SUPPORT \
- | OSC_ACTIVE_STATE_PWR_SUPPORT \
- | OSC_CLOCK_PWR_CAPABILITY_SUPPORT \
- | OSC_MSI_SUPPORT)
+#define ACPI_PCIE_REQ_SUPPORT (OSC_EXT_PCI_CONFIG_SUPPORT | OSC_MSI_SUPPORT)

static const struct acpi_device_id root_device_ids[] = {
{"PNP0A03", 0},
@@ -572,8 +569,10 @@ static int __devinit acpi_pci_root_add(s
if (flags != base_flags)
acpi_pci_osc_support(root, flags);

- if (!pcie_ports_disabled
- && (flags & ACPI_PCIE_REQ_SUPPORT) == ACPI_PCIE_REQ_SUPPORT) {
+ if (!pcie_ports_disabled) {
+ dev_info(root->bus->bridge,
+ "ACPI _OSC support set (0x%02x)\n", flags);
+
flags = OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL
| OSC_PCI_EXPRESS_NATIVE_HP_CONTROL
| OSC_PCI_EXPRESS_PME_CONTROL;

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