diff options
Diffstat (limited to 'drivers/gpu/drm/xe/xe_sync.c')
| -rw-r--r-- | drivers/gpu/drm/xe/xe_sync.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/gpu/drm/xe/xe_sync.c b/drivers/gpu/drm/xe/xe_sync.c index 2e72c06fd40d..f87276df18f2 100644 --- a/drivers/gpu/drm/xe/xe_sync.c +++ b/drivers/gpu/drm/xe/xe_sync.c @@ -83,10 +83,16 @@ static void user_fence_worker(struct work_struct *w) XE_WARN_ON("Copy to user failed"); kthread_unuse_mm(ufence->mm); mmput(ufence->mm); + } else { + drm_dbg(&ufence->xe->drm, "mmget_not_zero() failed, ufence wasn't signaled\n"); } - wake_up_all(&ufence->xe->ufence_wq); + /* + * Wake up waiters only after updating the ufence state, allowing the UMD + * to safely reuse the same ufence without encountering -EBUSY errors. + */ WRITE_ONCE(ufence->signalled, 1); + wake_up_all(&ufence->xe->ufence_wq); user_fence_put(ufence); } @@ -204,6 +210,7 @@ int xe_sync_entry_parse(struct xe_device *xe, struct xe_file *xef, return 0; } +ALLOW_ERROR_INJECTION(xe_sync_entry_parse, ERRNO); int xe_sync_entry_add_deps(struct xe_sync_entry *sync, struct xe_sched_job *job) { |