diff options
| author | Kristen Carlson Accardi | 2006-10-30 13:08:12 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2006-12-01 14:36:58 -0800 |
| commit | 0dcb2b7e722f62b886f28b01150860de67d219fa (patch) | |
| tree | e3dca7a3f5cd85932b7ca332d50168b25df8e03e /drivers/pci | |
| parent | 0a9dee2739fd4385e83c3316e3f3bee641796638 (diff) | |
pci: clear osc support flags if no _OSC method
So it looks like pci aer code will call pci_osc_support_set to tell the
firmware about OSC_EXT_PCI_CONFIG_SUPPORT flag. that causes
ctrlset_buf[OSC_SUPPORT_TYPE] to evaluate to true when pciehp calls
pci_osc_control_set() is called (to attempt to use OSC to gain native
pcie control from firmware), regardless of whether or not _OSC was
actually successfully executed. That causes this section of code:
if (ctrlset_buf[OSC_SUPPORT_TYPE] &&
((global_ctrlsets & ctrlset) != ctrlset)) {
return AE_SUPPORT;
}
to be hit.
This patch will reset the OSC_SUPPORT_TYPE field if _OSC fails, and then
would allow pciehp to go ahead and try to run _OSC again.
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pci-acpi.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index bb7456c1dbac..a064f36a0805 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -36,6 +36,7 @@ acpi_query_osc ( struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; union acpi_object *out_obj; u32 osc_dw0; + acpi_status *ret_status = (acpi_status *)retval; /* Setting up input parameters */ @@ -56,6 +57,7 @@ acpi_query_osc ( if (ACPI_FAILURE (status)) { printk(KERN_DEBUG "Evaluate _OSC Set fails. Status = 0x%04x\n", status); + *ret_status = status; return status; } out_obj = output.pointer; @@ -90,6 +92,7 @@ acpi_query_osc ( query_osc_out: kfree(output.pointer); + *ret_status = status; return status; } @@ -166,6 +169,7 @@ run_osc_out: acpi_status pci_osc_support_set(u32 flags) { u32 temp; + acpi_status retval; if (!(flags & OSC_SUPPORT_MASKS)) { return AE_TYPE; @@ -179,9 +183,13 @@ acpi_status pci_osc_support_set(u32 flags) acpi_get_devices ( PCI_ROOT_HID_STRING, acpi_query_osc, ctrlset_buf, - NULL ); + (void **) &retval ); ctrlset_buf[OSC_QUERY_TYPE] = !OSC_QUERY_ENABLE; ctrlset_buf[OSC_CONTROL_TYPE] = temp; + if (ACPI_FAILURE(retval)) { + /* no osc support at all */ + ctrlset_buf[OSC_SUPPORT_TYPE] = 0; + } return AE_OK; } EXPORT_SYMBOL(pci_osc_support_set); |