• Ondrej Zary's avatar
    pata_it821x: resume from hibernation fails with RAID volume · 7ba07d16
    Ondrej Zary authored
    Hibernation didn't work for me since I started to use IT8212 controller.
    I did some debugging (booting with no_console_suspend init=/bin/sh).
    
    Found that resume fails (2.6.28) with "serial number mismatch 'some
    garbage' != 'some other garbage'" and "revalidation failed" messages.
    That's because the controller firmware fills different serial number in
    the IDENTIFY every boot.
    
    The patch below fixes the resume simply clearing the serial number.  The
    proper fix would be probably to fill in the serial number of the RAID
    volume instead.  I assume that there must be something like that stored on
    the drives but I don't know where.
    
    Fix resume on pata_it821x RAID volume by clearing the serial number in
    IDENTIFY data, which is otherwise different on each boot.
    Signed-off-by: default avatarOndrej Zary <linux@rainbow-software.org>
    Acked-by: default avatarAlan Cox <alan@lxorguk.ukuu.org.uk>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
    7ba07d16
pata_it821x.c 27.3 KB