On 09/07/2025 11:29, Philipp Stanner wrote:

When the GPU scheduler was ported to using a struct for its initialization parameters, it was overlooked that panfrost creates a distinct workqueue for timeout handling.

The pointer to this new workqueue is not initialized to the struct, resulting in NULL being passed to the scheduler, which then uses the system_wq for timeout handling.

Set the correct workqueue to the init args struct.

Cc: stable@vger.kernel.org # 6.15+ Fixes: 796a9f55a8d1 ("drm/sched: Use struct for drm_sched_init() params") Reported-by: Tvrtko Ursulin tvrtko.ursulin@igalia.com Closes: https://lore.kernel.org/dri-devel/b5d0921c-7cbf-4d55-aa47-c35cd7861c02@igali... Signed-off-by: Philipp Stanner phasta@kernel.org

---

drivers/gpu/drm/panfrost/panfrost_job.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c index 5657106c2f7d..15e2d505550f 100644 --- a/drivers/gpu/drm/panfrost/panfrost_job.c +++ b/drivers/gpu/drm/panfrost/panfrost_job.c @@ -841,7 +841,6 @@ int panfrost_job_init(struct panfrost_device *pfdev) .num_rqs = DRM_SCHED_PRIORITY_COUNT, .credit_limit = 2, .timeout = msecs_to_jiffies(JOB_TIMEOUT_MS),

• .timeout_wq = pfdev->reset.wq,
  

  .name = "pan_js", .dev = pfdev->dev, };

@@ -879,6 +878,7 @@ int panfrost_job_init(struct panfrost_device *pfdev) pfdev->reset.wq = alloc_ordered_workqueue("panfrost-reset", 0); if (!pfdev->reset.wq) return -ENOMEM;

• args.timeout_wq = pfdev->reset.wq;

for (j = 0; j < NUM_JOB_SLOTS; j++) { js->queue[j].fence_context = dma_fence_context_alloc(1);

Reviewed-by: Tvrtko Ursulin tvrtko.ursulin@igalia.com

Regards,

Tvrtko