Make multiple FS begin calls noops() SDFS/LittleFS by earlephilhower · Pull Request #8235 · esp8266/Arduino (original) (raw)
When LittleFS.begin() or SDFS.begin() is called after the filesystem is
already mounted, don't unmount/remount. When an unmount happens, all old
Files become invalid (but the core doesn't know this), so you would end
up with random crashes in FS code.
Now, check for _mounted, and if so just return immediately from begin().
This mimics the original SPIFFS code.