diff options
| -rw-r--r-- | arch/powerpc/kernel/rtas.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c index ae9b10c954a1..f60a8e7bd5ed 100644 --- a/arch/powerpc/kernel/rtas.c +++ b/arch/powerpc/kernel/rtas.c @@ -572,11 +572,21 @@ static const struct rtas_function *rtas_token_to_function(s32 token) return NULL; func = rtas_token_to_function_untrusted(token); + if (func) + return func; + /* + * Fall back to linear scan in case the reverse mapping hasn't + * been initialized yet. + */ + if (xa_empty(&rtas_token_to_function_xarray)) { + for_each_rtas_function(func) { + if (func->token == token) + return func; + } + } - if (WARN_ONCE(!func, "unexpected failed lookup for token %d", token)) - return NULL; - - return func; + WARN_ONCE(true, "unexpected failed lookup for token %d", token); + return NULL; } /* This is here deliberately so it's only used in this file */ |