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authorRafael J. Wysocki <rjw@sisk.pl>2010-08-21 01:52:37 +0200
committerJesse Barnes <jbarnes@virtuousgeek.org>2010-08-24 13:43:20 -0700
commitb879dc4b3e81069e3f715b7569bb0f43eed76c76 (patch)
treeb60fadcfd78c7b4fa086f381333786dc42671cab /drivers/acpi
parent79dd9182db2072d63ccf160bb9a3463b1c952723 (diff)
downloadblackbird-op-linux-b879dc4b3e81069e3f715b7569bb0f43eed76c76.tar.gz
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ACPI/PCI: Reorder checks in acpi_pci_osc_control_set()
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>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/pci_root.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 1f67057af2a5..e10dbafa0569 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -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)
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