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Konstantin Khlebnikov committed 9349f8af28e
staging: vme_pio2: fix oops on module unloading This patch forbids loading vme_pio2 module without specifing "num_bus" parameter. Otherwise on module unloading pio2_exit() calls vme_unregister_driver() for not registered pio2_driver. Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org> Cc: Manohar Vanga <manohar.vanga@gmail.com> Acked-by: Martyn Welch <martyn.welch@ge.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>