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The acpi_query_osc() 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() in acpi_query_osc(). Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>