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ACPI/PCI: handle multiple _OSC 

The pci_osc_control_set() function can be called for the ACPI object
that doesn't have _OSC method. In this case, acpi_get_osc_data() would
allocate a useless memory region. To avoid this, we need to check the
existence of _OSC before calling acpi_get_osc_data(). Here is a patch
to fix this problem in pci_osc_control_set.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Kenji Kaneshige 2008-05-12 22:55:45 +09:00 committed by Jesse Barnes
parent a5d1c87983
commit 34a65055e5
1 changed files with 7 additions and 1 deletions
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8
drivers/pci/pci-acpi.c
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@ -232,8 +232,14 @@ acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
{
acpi_status status;
u32 ctrlset;
struct acpi_osc_data *osc_data = acpi_get_osc_data(handle);
acpi_handle tmp;
struct acpi_osc_data *osc_data;
status = acpi_get_handle(handle, "_OSC", &tmp);
if (ACPI_FAILURE(status))
return status;
osc_data = acpi_get_osc_data(handle);
if (!osc_data) {
printk(KERN_ERR "acpi osc data array is full\n");
return AE_ERROR;