[PATCH 6/6] drm/msm: Fix task_struct reference leak in recover_worker

[Akhil P Oommen]

From: Jie Zhang <jie.zhang@xxxxxxxxxxxxxxxx>

get_pid_task() increments the task reference count, but the
corresponding put_task_struct() was missing in the else branch,
leaking a reference on every GPU hang recovery.

Fixes: 25654a1756a4 ("drm/msm: Update global fault counter when faulty process has already ended")
Signed-off-by: Jie Zhang <jie.zhang@xxxxxxxxxxxxxxxx>
Signed-off-by: Akhil P Oommen <akhilpo@xxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/msm/msm_gpu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
index 48ac51f4119b..03c057856065 100644
--- a/drivers/gpu/drm/msm/msm_gpu.c
+++ b/drivers/gpu/drm/msm/msm_gpu.c
@@ -505,6 +505,8 @@ static void recover_worker(struct kthread_work *work)
 		 */
 		if (!vm->managed)
 			msm_gem_vm_unusable(submit->vm);
+
+		put_task_struct(task);
 	}
 
 	noreclaim_flag = memalloc_noreclaim_save();

-- 
2.51.0