On Tue, Apr 21, 2020 at 04:41:23PM +0800, Shengjiu Wang wrote: > Use dev_dbg instead of dev_err in irq handler, the dev_err > is expensive, we don't need the message to be printed everytime, > which is almost a debug option.
> if (esr & ESAI_ESR_RFF_MASK) > - dev_warn(&pdev->dev, "isr: Receiving overrun\n"); > + dev_dbg(&pdev->dev, "isr: Receiving overrun\n"); > > if (esr & ESAI_ESR_TFE_MASK) > - dev_warn(&pdev->dev, "isr: Transmission underrun\n"); > + dev_dbg(&pdev->dev, "isr: Transmission underrun\n"); These are error messages which would suggest a problem that'd lead to data corruption, it seems bad not to try to flag that to the user - surely we've got bigger problems than performance if this happens? Perhaps convert to a ratelimited print if the issue is that when errors happen they happen a lot?
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