Re: [PATCH] ASoC: fsl_esai: Remove expensive print in irq handler
Hi On Tue, Apr 21, 2020 at 5:53 PM Mark Brown wrote: > > 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(>dev, "isr: Receiving overrun\n"); > > + dev_dbg(>dev, "isr: Receiving overrun\n"); > > > > if (esr & ESAI_ESR_TFE_MASK) > > - dev_warn(>dev, "isr: Transmission underrun\n"); > > + dev_dbg(>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? Thanks for review, I will rethink about this. best regards wang shengjiu
Re: [PATCH] ASoC: fsl_esai: Remove expensive print in irq handler
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(>dev, "isr: Receiving overrun\n"); > + dev_dbg(>dev, "isr: Receiving overrun\n"); > > if (esr & ESAI_ESR_TFE_MASK) > - dev_warn(>dev, "isr: Transmission underrun\n"); > + dev_dbg(>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? signature.asc Description: PGP signature
[PATCH] ASoC: fsl_esai: Remove expensive print in irq handler
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. Signed-off-by: Shengjiu Wang --- sound/soc/fsl/fsl_esai.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sound/soc/fsl/fsl_esai.c b/sound/soc/fsl/fsl_esai.c index c7a49d03463a..453392a9cd68 100644 --- a/sound/soc/fsl/fsl_esai.c +++ b/sound/soc/fsl/fsl_esai.c @@ -94,10 +94,10 @@ static irqreturn_t esai_isr(int irq, void *devid) dev_dbg(>dev, "isr: Transmission Initialized\n"); if (esr & ESAI_ESR_RFF_MASK) - dev_warn(>dev, "isr: Receiving overrun\n"); + dev_dbg(>dev, "isr: Receiving overrun\n"); if (esr & ESAI_ESR_TFE_MASK) - dev_warn(>dev, "isr: Transmission underrun\n"); + dev_dbg(>dev, "isr: Transmission underrun\n"); if (esr & ESAI_ESR_TLS_MASK) dev_dbg(>dev, "isr: Just transmitted the last slot\n"); -- 2.21.0
