On Thu, May 03, 2018 at 01:09:44PM -0500, Rob Herring wrote: > The root cause however is a bug in the shared handler. Shared handlers > must check that interrupts are actually enabled before servicing the > interrupt. Add a check that the TXEMPTY or IDLE interrupts are enabled. The requirement is more that the handler should correctly identify if it actually handled an interrupt - especially if the driver doesn't enable and disable the interrupt at runtime it's not going to upset anything to always run the interrupt handling (and of course some hardware can't disable things anyway) but if nohing happened then the handler needs to return IRQ_NONE.
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