1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
index bc05b104eaed..8faf472c430f 100644
--- a/kernel/locking/rtmutex.c
+++ b/kernel/locking/rtmutex.c
@@ -605,7 +605,7 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
          * enabled we continue, but stop the requeueing in the chain
          * walk.
          */
-        if (waiter->prio == task->prio) {
+        if (waiter->prio == task->prio && !dl_task(task)) {
                 if (!detect_deadlock)
                         goto out_unlock_pi;
                 else