+ prd_table[0].size = cpu_to_le32(UFS_SENSE_SIZE - 1); UFSHCI specifies Data Byte Count (DBC) like this: A ‘0’ based value that indicates the length, in bytes, of the data block. A maximum of length of 256KB may exist for any entry. Bits 1:0 of this field shall be 11b to indicate Dword granularity. A value of ‘3’ indicates 4 bytes, ‘7’ indicates 8 bytes, etc. That means the size value should be aligned with 4. And as I know it's 18. Thanks. Kiwoong Kim