hw/serial: don't create a char device if none is specified
When creating null devices, there is no way to ensure the unicity of the labels. Bail out with an error message instead. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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@ -712,9 +712,14 @@ static void serial_reset(void *opaque)
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static void serial_init_core(SerialState *s, qemu_irq irq, int baudbase,
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CharDriverState *chr)
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{
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if (!chr) {
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fprintf(stderr, "Can't create serial device, empty char device\n");
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exit(1);
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}
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s->irq = irq;
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s->baudbase = baudbase;
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s->chr = chr ?: qemu_chr_open("null", "null", NULL);
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s->chr = chr;
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s->modem_status_poll = qemu_new_timer(vm_clock, (QEMUTimerCB *) serial_update_msl, s);
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