• Michael Holzheu's avatar
    [S390] Fix reboot hang on LPARs · a45e1414
    Michael Holzheu authored
    
    
    Reboot hangs on LPARs without diag308 support. The reason for this is,
    that before the reboot is done, the channel subsystem is shut down.
    During the reset on each possible subchannel a "store subchannel" is
    done. This operation can end in a program check interruption, if the
    specified subchannel set is not implemented by the hardware. During
    the reset, currently we do not have a program check handler, which
    leads to the described kernel bug. We install now a new program check
    handler for the reboot code to fix this problem.
    Signed-off-by: default avatarMichael Holzheu <holzheu@de.ibm.com>
    Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
    a45e1414