[PATCH 1/2] drm/scheduler: Set sched->thread to NULL on failure

Sharat Masetty
2018-11-02T10:31:32Z

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

Signed-off-by: Sharat Masetty <smasetty@codeaurora.org>
---
drivers/gpu/drm/scheduler/sched_main.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
index 44fe587..c993d10 100644
--- a/drivers/gpu/drm/scheduler/sched_main.c
+++ b/drivers/gpu/drm/scheduler/sched_main.c
@@ -594,7 +594,7 @@ 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;
@@ -615,8 +615,10 @@ 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;
--
1.9.1