- if((Transfer == MMC_IOBLOCKS_WRITE) && (This->Media->ReadOnly == TRUE)) {\r
- return EFI_WRITE_PROTECTED;\r
+ // The buffer size must be an exact multiple of the block size\r
+ if ((BufferSize % This->Media->BlockSize) != 0) {\r
+ return EFI_BAD_BUFFER_SIZE;\r
+ }\r
+\r
+ // Check the alignment\r
+ if ((This->Media->IoAlign > 2) && (((UINTN)Buffer & (This->Media->IoAlign - 1)) != 0)) {\r
+ return EFI_INVALID_PARAMETER;\r