• Hendrik Brueckner's avatar
    [S390] hvc_iucv: Special handling of IUCV HVC devices · 6c089fd3
    Hendrik Brueckner authored
    This patch introduces special handling of the IUCV HVC console device.
    
    If the first IUCV HVC terminal is used as (preferred) Linux console, and
    needs some special handling for hangup.
    The hvc_iucv_private structure contains a flag to indicate whether a IUCV
    HVC device is used as a console.
    
    A terminal acting as "console" behaves different if a tty hangup occurs:
    If the iucv communication path is severed, a tty hangup is not
    triggered (because the HVC layer does not notify its back-end in that case).
    Instead, the console session is left unchanged and the IUCV HVC device is
    reset to allow re-connects.
    Note: Any output between the disconnect and a re-connect is discarded.
    Signed-off-by: default avatarHendrik Brueckner <brueckner@linux.vnet.ibm.com>
    Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
    6c089fd3
hvc_iucv.c 28 KB