isdn/capi: Return proper errnos on module init.
cdebug_init() is called from kcapi_init() which is module initialization function, so it must return negative values on errors. Signed-off-by: NMarcin Slusarz <marcin.slusarz@gmail.com> Acked-by: NKarsten Keil <kkeil@suse.de> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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