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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>
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@ -232,8 +232,14 @@ acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
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{
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acpi_status status;
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u32 ctrlset;
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struct acpi_osc_data *osc_data = acpi_get_osc_data(handle);
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acpi_handle tmp;
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struct acpi_osc_data *osc_data;
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status = acpi_get_handle(handle, "_OSC", &tmp);
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if (ACPI_FAILURE(status))
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return status;
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osc_data = acpi_get_osc_data(handle);
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if (!osc_data) {
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printk(KERN_ERR "acpi osc data array is full\n");
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return AE_ERROR;
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