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    serial: check if backed by a physical serial port at realize time · a30cf876
    Paolo Bonzini 提交于
    Right now, s->poll_msl may linger at "0" value for an arbitrarily long
    time, until serial_update_msl is called for the first time.  This is
    unnecessary, and will lead to the s->poll_msl field being unnecessarily
    migrated.
    
    We can call serial_update_msl immediately at realize time (via
    serial_reset) and be done with it.  The memory-mapped UART was already
    doing that, but not the ISA and PCI variants.
    
    Regarding the delta bits, be consistent with what serial_reset does when
    the serial port is not backed by a physical serial port, and always clear
    them at reset time.
    Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
    a30cf876
serial.c 28.3 KB