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

["Koenig, Christian" <Christian.Koenig-5C7GfCeVMHo@public.gmane.org>]

Am 29.11.18 um 11:05 schrieb Sharat Masetty:
> 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>

Reviewed-by: Christian König <christian.koenig@amd.com>

> ---
>   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;

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