Hi Marek, On 11/4/24 04:44, Marek Vasut wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the > content is safe > > On 10/23/24 8:47 PM, Marek Vasut wrote: > > Hello again, > >>> Is power-save enabled during the test. With PS enabled, The SDIO >>> commands may >>> fail momentarily but it should recover. >> >> It seems it gets enabled after first ifconfig up, that's a good hint, >> I'll try to disable it and see if that makes them errors go away. Thanks! >> >> Do you have any details on WHY would such sporadic errors occur and how >> to make those go away even with PS enabled ? > Can you explain why does uAPSD (iw ...set power_save off) adversely > affect SDIO bus stability ? > SDIO bus errors can occur for different reasons and those errors can be of recoverable or non-recoverable type. For non-recoverable failures like firmware crashes, the retry mechanism may not help to resolve the issue. If the error is recoverable then driver should work with retry attempts. I think you are observing the bus errors messages and it is recovering after that. Is my understanding correct? With the previous shared test procedure, which makes the interface up/down continuously, the station may not go into the Doze/Awake sequence since that mode switching gets activated after connection with AP. > Can you explain how to prevent that or shall we disable uAPSD altogether ? Could you please share the test procedure and logs. I am occupied at the moment but I shall make some time to look into it and get a better understanding. Regard, Ajay
