• Julian Wiedmann's avatar
    s390/qeth: phase out OSN support · fb64de1b
    Julian Wiedmann authored
    OSN devices currently spend an awful long time in qeth_l2_set_online()
    until various unsupported HW cmds time out. This has been broken for
    over two years, ever since
    commit d22ffb5a ("s390/qeth: fix IPA command submission race")
    triggered a FW bug in cmd processing.
    Prior to commit 782e4a79 ("s390/qeth: don't poll for cmd IO completion"),
    this wait for timeout would have even been spent busy-polling.
    
    The offending patch was picked up by stable and all relevant distros,
    and yet noone noticed.
    OSN setups only ever worked in combination with an out-of-tree blob, and
    the last machine that even offered HW with OSN support was released back
    in 2015.
    
    Rather than attempting to work-around this FW issue for no actual gain,
    add a deprecation warning so anyone who still wants to maintain this
    part of the code can speak up. Else rip it all out in 2021.
    Signed-off-by: default avatarJulian Wiedmann <jwi@linux.ibm.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    fb64de1b
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