x86: io delay - add checking for NULL early param
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Cc: akpm@linux-foundation.org Cc: andi@firstfloor.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -103,6 +103,9 @@ void __init io_delay_init(void)
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static int __init io_delay_param(char *s)
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{
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if (!s)
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return -EINVAL;
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if (!strcmp(s, "0x80"))
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io_delay_type = CONFIG_IO_DELAY_TYPE_0X80;
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else if (!strcmp(s, "0xed"))
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