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ACPI/PCI: Make acpi_pci_query_osc() return control bits 

Make acpi_pci_query_osc() use an additional pointer argument to
return the mask of control bits obtained from the BIOS to the
caller.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Rafael J. Wysocki 2010-08-21 01:53:27 +02:00 committed by Jesse Barnes
parent b879dc4b3e
commit ab8e8957a2
1 changed files with 24 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
drivers/acpi/pci_root.c
View File

@ -226,22 +226,35 @@ static acpi_status acpi_pci_run_osc(acpi_handle handle,
return status;
}
static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, u32 flags)
static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root,
u32 support,
u32 *control)
{
acpi_status status;
u32 support_set, result, capbuf[3];
u32 result, capbuf[3];
support &= OSC_PCI_SUPPORT_MASKS;
support |= root->osc_support_set;
/* do _OSC query for all possible controls */
support_set = root->osc_support_set | (flags & OSC_PCI_SUPPORT_MASKS);
capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
capbuf[OSC_SUPPORT_TYPE] = support_set;
capbuf[OSC_CONTROL_TYPE] = OSC_PCI_CONTROL_MASKS;
capbuf[OSC_SUPPORT_TYPE] = support;
if (control) {
*control &= OSC_PCI_CONTROL_MASKS;
capbuf[OSC_CONTROL_TYPE] = *control | root->osc_control_set;
} else {
/* Run _OSC query for all possible controls. */
capbuf[OSC_CONTROL_TYPE] = OSC_PCI_CONTROL_MASKS;
}
status = acpi_pci_run_osc(root->device->handle, capbuf, &result);
if (ACPI_SUCCESS(status)) {
root->osc_support_set = support_set;
root->osc_control_qry = result;
root->osc_queried = 1;
root->osc_support_set = support;
if (control) {
*control = result;
} else {
root->osc_control_qry = result;
root->osc_queried = 1;
}
}
return status;
}
@ -255,7 +268,7 @@ static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags)
if (ACPI_FAILURE(status))
return status;
mutex_lock(&osc_lock);
status = acpi_pci_query_osc(root, flags);
status = acpi_pci_query_osc(root, flags, NULL);
mutex_unlock(&osc_lock);
return status;
}
@ -397,7 +410,7 @@ acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 flags)
/* Need to query controls first before requesting them */
if (!root->osc_queried) {
status = acpi_pci_query_osc(root, root->osc_support_set);
status = acpi_pci_query_osc(root, root->osc_support_set, NULL);
if (ACPI_FAILURE(status))
goto out;
}