[2/2] drm/scheduler: set sched->thread to NULL in failure

Commit Message

Sharat Masetty Sept. 3, 2018, 7:24 a.m. UTC

In cases where the scheduler instance is used a base object of another
vendor driver object, it's not clear if the driver can call sched cleanup on
the fail path. Set the sched->thread to NULL, so that the vendor driver
can safely call drm_sched_fini() during cleanup.

Signed-off-by: Sharat Masetty <[e-mail]>
---
 drivers/gpu/drm/scheduler/gpu_scheduler.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

Patch

diff --git a/drivers/gpu/drm/scheduler/gpu_scheduler.c b/drivers/gpu/drm/scheduler/gpu_scheduler.c
index 44d4807..bf0e0c9 100644
--- a/drivers/gpu/drm/scheduler/gpu_scheduler.c
+++ b/drivers/gpu/drm/scheduler/gpu_scheduler.c
@@ -760,7 +760,7 @@  int drm_sched_init(struct drm_gpu_scheduler *sched,
 		   long timeout,
 		   const char *name)
 {
-	int i;
+	int i, ret;
 	sched->ops = ops;
 	sched->hw_submission_limit = hw_submission;
 	sched->name = name;
@@ -779,8 +779,10 @@  int drm_sched_init(struct drm_gpu_scheduler *sched,
 	/* Each scheduler will run on a seperate kernel thread */
 	sched->thread = kthread_run(drm_sched_main, sched, sched->name);
 	if (IS_ERR(sched->thread)) {
+		ret = PTR_ERR(sched->thread);
+		sched->thread = NULL;
 		DRM_ERROR("Failed to create scheduler for %s.\n", name);
-		return PTR_ERR(sched->thread);
+		return ret;
 	}
 
 	return 0;