[PATCH][next] ftrace: Fix null memory allocation check

[Colin Ian King]

The check for a failed memory location is incorrectly checking
the wrong level of pointer indirection by checking !filter_hash
rather than !*filter_hash.  Fix this.

Fixes: 0ae6b8ce200d ("ftrace: Fix accounting of subop hashes")
Signed-off-by: Colin Ian King <colin.i.k...@gmail.com>
---
 kernel/trace/ftrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 61130bb34d6c..6981830c3128 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -3436,7 +3436,7 @@ static int add_next_hash(struct ftrace_hash 
**filter_hash, struct ftrace_hash **
 
                /* Copy the subops hash */
                *filter_hash = alloc_and_copy_ftrace_hash(size_bits, 
subops_hash->filter_hash);
-               if (!filter_hash)
+               if (!*filter_hash)
                        return -ENOMEM;
                /* Remove any notrace functions from the copy */
                remove_hash(*filter_hash, subops_hash->notrace_hash);
-- 
2.49.0