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-rw-r--r--drivers/acpi/tables.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
index c3419182c9a7..775c97a282bd 100644
--- a/drivers/acpi/tables.c
+++ b/drivers/acpi/tables.c
@@ -300,6 +300,8 @@ int __init acpi_table_init(void)
300 300
301static int __init acpi_parse_apic_instance(char *str) 301static int __init acpi_parse_apic_instance(char *str)
302{ 302{
303 if (!str)
304 return -EINVAL;
303 305
304 acpi_apic_instance = simple_strtoul(str, NULL, 0); 306 acpi_apic_instance = simple_strtoul(str, NULL, 0);
305 307