[tip:locking/core] lockdep: Fix incorrect condition to print bug msgs for MAX_LOCKDEP_CHAIN_HLOCKS

[tip-bot for Byungchul Park]

Commit-ID:  f9af456a61ecfbef8233c5046a9e347c9b98ba05
Gitweb:     http://git.kernel.org/tip/f9af456a61ecfbef8233c5046a9e347c9b98ba05
Author:     Byungchul Park <byungchul.park@xxxxxxx>
AuthorDate: Fri, 13 Jan 2017 11:42:04 +0900
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Fri, 10 Feb 2017 09:09:48 +0100

lockdep: Fix incorrect condition to print bug msgs for MAX_LOCKDEP_CHAIN_HLOCKS

Bug messages and stack dump for MAX_LOCKDEP_CHAIN_HLOCKS should only
be printed once.

Signed-off-by: Byungchul Park <byungchul.park@xxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Sasha Levin <sasha.levin@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1484275324-28192-1-git-send-email-byungchul.park@xxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 kernel/locking/lockdep.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 7c38f8f..bf60725 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -2203,7 +2203,7 @@ cache_hit:
 	 * Important for check_no_collision().
 	 */
 	if (unlikely(nr_chain_hlocks > MAX_LOCKDEP_CHAIN_HLOCKS)) {
-		if (debug_locks_off_graph_unlock())
+		if (!debug_locks_off_graph_unlock())
 			return 0;
 
 		print_lockdep_off("BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!");