Linux/AM3352: SPI driver module doesn't work after reinstall

Part Number:AM3352

Tool/software: Linux

My customer want to use driver as module, they found the SPI driver doesn't work after reinstall. Detail as below.

#1. Configuration:

#2. install module

#3. work normally.

#4. remove module

#5. reinstall module

#6. doesn't work after reinstall module

#7. driver code print the error, it is original code.

#8. SDK version:

Please help look into the issue.