Commit 44d2f310 authored by Philipp Stanner's avatar Philipp Stanner
Browse files

drm/sched: drm_sched_job_cleanup(): correct false doc 



drm_sched_job_cleanup()'s documentation claims that calling
drm_sched_job_arm() is a "point of no return", implying that afterwards
a job cannot be cancelled anymore.

This is not correct, as proven by the function's code itself, which
takes a previous call to drm_sched_job_arm() into account. In truth, the
decisive factors are whether fences have been shared (e.g., with other
processes) and if the job has been submitted to an entity already.

Correct the wrong docstring.

Reviewed-by: default avatarTvrtko Ursulin <tvrtko.ursulin@igalia.com>
Signed-off-by: default avatarPhilipp Stanner <phasta@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20250304141346.102683-2-phasta@kernel.org
parent c82734fb

drivers/gpu/drm/scheduler/sched_main.c

+7 −5
Original line number Diff line number Diff line
@@ -1015,11 +1015,13 @@ EXPORT_SYMBOL(drm_sched_job_has_dependency); 
 * Cleans up the resources allocated with drm_sched_job_init().

 *

 * Drivers should call this from their error unwind code if @job is aborted

 * before drm_sched_job_arm() is called.

 * before it was submitted to an entity with drm_sched_entity_push_job().

 *

 * After that point of no return @job is committed to be executed by the

 * scheduler, and this function should be called from the

 * &drm_sched_backend_ops.free_job callback.

 * Since calling drm_sched_job_arm() causes the job's fences to be initialized,

 * it is up to the driver to ensure that fences that were exposed to external

 * parties get signaled. drm_sched_job_cleanup() does not ensure this.

 *

 * This function must also be called in &struct drm_sched_backend_ops.free_job

 */

void drm_sched_job_cleanup(struct drm_sched_job *job)

{
@@ -1030,7 +1032,7 @@ void drm_sched_job_cleanup(struct drm_sched_job *job) 
		/* drm_sched_job_arm() has been called */

		dma_fence_put(&job->s_fence->finished);

	} else {

		/* aborted job before committing to run it */

		/* aborted job before arming */

		drm_sched_fence_free(job->s_fence);

	}