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    SubjectRe: RTL8139 Interrupt line blocked
    From: "Alan Cox" <>
    > > > eth3: SMP simultaneous entry of an interrupt handler.
    > > rtl8129() is running on both cpus: [i guess because]
    > > * one cpu because the hardware interrupt arrived
    > > * one cpu because the timer called the function.
    > That would explain the problem. In which case you may want to put
    > a spin_lock_irqsave() around the interrupt and timer to fix it

    AFAICS dev->interrupt is used as spin_trylock():
    before doing real work, the interrupt handler calls
    But I don't understand why dev->interrupt is set to 0 if this
    "do_it_yourself_spin_trylock()" fails.


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