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-rw-r--r--drivers/pci/pci-acpi.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index dfe7c8e1b18..b3a63edb690 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -83,6 +83,9 @@ static acpi_status acpi_run_osc(acpi_handle handle,
if (ACPI_FAILURE(status))
return status;
+ if (!output.length)
+ return AE_NULL_OBJECT;
+
out_obj = output.pointer;
if (out_obj->type != ACPI_TYPE_BUFFER) {
printk(KERN_DEBUG "Evaluate _OSC returns wrong type\n");