yamt opened a new pull request #2947:
URL: https://github.com/apache/incubator-nuttx/pull/2947


   ## Summary
   
   esp32_ummap: write back spiram cache before calling Cache_Flush
   
   This seems to fix esp32_readdata_encrypted() with spiram "buffer".
   
   Note: I'm not sure if this is the right fix or not.
   I couldn't find any documentation about Cache_Flush.
   
   ## Impact
   
   ## Testing
   confirmed to fix the data corruption observed on an esp32 board
   


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