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  • linux-arm
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  • hw
  • serial.c
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  • Thomas Gleixner's avatar
    kvm tools: serial: Make it work with non rt guests as well · 8dfae8be
    Thomas Gleixner authored Dec 10, 2011
    
    
    Sasha reported, that a non RT guest reports "too much work for irq 4"
    with the previous serial overhaul.
    
    The reason is, that the new code allows unlimited tx transfers, which
    triggers the sanity check in the 8250.c interrupt handler.
    
    Limit the consecutive TX chars to 16 and let the guest kernel escape
    from the 8250 interrupt handler. Set the TEMT/THRE bits in the
    periodic serial console update.
    
    Reported-by: default avatarSasha Levin <levinsasha928@gmail.com>
    Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
    Signed-off-by: default avatarPekka Enberg <penberg@kernel.org>
    8dfae8be