drm/panthor: Fail job creation when the group is dead

Userspace can use GROUP_SUBMIT errors as a trigger to check the group
state and recreate the group if it became unusable. Make sure we
report an error when the group became unusable.

Changes in v3:
- None

Changes in v2:
- Add R-bs

Fixes: de8548813824 ("drm/panthor: Add the scheduler logical block")
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241029152912.270346-2-boris.brezillon@collabora.com

diff --git a/drivers/gpu/drm/panthor/panthor_sched.c b/drivers/gpu/drm/panthor/panthor_sched.c
index aee362abb7101daa2c9c4d5adb2c9874b7cef6a3..05119d9bb279364cebae4c1446b6e285e6404b21 100644 (file)
--- a/drivers/gpu/drm/panthor/panthor_sched.c
+++ b/drivers/gpu/drm/panthor/panthor_sched.c
@@ -3409,6 +3409,11 @@ panthor_job_create(struct panthor_file *pfile,
                goto err_put_job;
        }
 
+       if (!group_can_run(job->group)) {
+               ret = -EINVAL;
+               goto err_put_job;
+       }
+
        if (job->queue_idx >= job->group->queue_count ||
            !job->group->queues[job->queue_idx]) {
                ret = -EINVAL;