On Thu, 2016-03-10 at 20:51 +0800, Joseph Chang wrote: > I did verify to dump EEPROM data and also write EEPROM by per byte. > > 1.Plug dm9601/dm9621 adapter and has get dm9601.ko be 'insmod' to have 'eht0', > 2.Run ethtool v3.7 (as attached executable file and it's help display.) > 3. Commands: > ./ethtool -e eth0 (dump EEPROM data for all the .get_eeprom_len ) > ./ethtool -E eth0 magic 0x9620 offset 0 value 0xf1 (write 0xf1 to eeprom byte0) > ./ethtool -E eth0 magic 0x9620 offset 1 value 0xf2 (write 0xf2 to eeprom byte1) > ./ethtool -E eth0 magic 0x9620 offset 2 value 0xf3 (write 0xf3 to eeprom byte2) [...] So you only tested writing 1 byte at a time. Try again with 3 bytes and you'll see how it goes wrong. Ben. -- Ben Hutchings To err is human; to really foul things up requires a computer.
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