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acpi: add checking for NULL early param
The early_param handling function could recieve NULL pointer as argument in case if user didn't enter parameter value. So we have to be ready for a such situation and do check for NULL pointer if needed. Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andi Kleen <ak@linux.intel.com>
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@ -300,6 +300,8 @@ int __init acpi_table_init(void)
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static int __init acpi_parse_apic_instance(char *str)
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{
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if (!str)
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return -EINVAL;
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acpi_apic_instance = simple_strtoul(str, NULL, 0);
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