[ACPI] deal with lack of acpi prt entries gracefully (Jesse Barnes)

463594bc · Len Brown · Len Brown · 1eaa1ef7 · 463594bc
Commit 463594bc authored 21 years ago by Len Brown Committed by Len Brown 21 years ago
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drivers/acpi/pci_irq.c drivers/acpi/pci_irq.c +3 -0

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--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -71,6 +71,9 @@ acpi_pci_irq_find_prt_entry (

 	ACPI_FUNCTION_TRACE("acpi_pci_irq_find_prt_entry");

+	if (!acpi_prt.count)
+		return_PTR(NULL);
+
 	/*
 	 * Parse through all PRT entries looking for a match on the specified
 	 * PCI device's segment, bus, device, and pin (don't care about func).