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DM365 UBL: NAND ECC : Too many errors are detected!!!

Hello expert.

A customer is seeing the errors when reading uImage from NAND even though they applied a patch for "Advisory 1.2.4 Bootloader: RBL Code 4bit ECC Mode Limitation".

Is this error  inevitable even with the patch?

Or something missing other than adding following dummy read?

temp = AEMIF->NANDERRADD1;

Regards,

N.Shinozaki