• Dan Streetman's avatar
    crypto: nx - prevent nx 842 load if no hw driver · 3e648cbe
    Dan Streetman authored
    Change the nx-842 common driver to wait for loading of both platform
    drivers, and fail loading if the platform driver pointer is not set.
    Add an independent platform driver pointer, that the platform drivers
    set if they find they are able to load (i.e. if they find their platform
    devicetree node(s)).
    
    The problem is currently, the main nx-842 driver will stay loaded even
    if there is no platform driver and thus no possible way it can do any
    compression or decompression.  This allows the crypto 842-nx driver
    to load even if it won't actually work.  For crypto compression users
    (e.g. zswap) that expect an available crypto compression driver to
    actually work, this is bad.  This patch fixes that, so the 842-nx crypto
    compression driver won't load if it doesn't have the driver and hardware
    available to perform the compression.
    Signed-off-by: default avatarDan Streetman <ddstreet@ieee.org>
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
    3e648cbe
nx-842-pseries.c 32.1 KB