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ACPI/PCI: Reorder checks in acpi_pci_osc_control_set()

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Make acpi_pci_osc_control_set() attempt to find the handle of the
_OSC object under the given PCI root bridge object after verifying
that its second argument is correct and that there is a struct
acpi_pci_root object for the given root bridge handle, which is
more logical than the old code.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reviewed-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Rafael J. Wysocki 2010-08-21 01:52:37 +02:00 committed by Jesse Barnes
parent 79dd9182db
commit b879dc4b3e
1 changed files with 4 additions and 4 deletions
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8
drivers/acpi/pci_root.c
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@ -378,10 +378,6 @@ acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 flags)
acpi_handle tmp;
struct acpi_pci_root *root;
status = acpi_get_handle(handle, "_OSC", &tmp);
if (ACPI_FAILURE(status))
return status;
control_req = (flags & OSC_PCI_CONTROL_MASKS);
if (!control_req)
return AE_TYPE;
@ -390,6 +386,10 @@ acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 flags)
if (!root)
return AE_NOT_EXIST;
status = acpi_get_handle(handle, "_OSC", &tmp);
if (ACPI_FAILURE(status))
return status;
mutex_lock(&osc_lock);
/* No need to evaluate _OSC if the control was already granted. */
if ((root->osc_control_set & control_req) == control_req)