diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c b/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c index 8db7e93abde5..1c6c6692dd17 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c +++ b/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c @@ -65,6 +65,7 @@ static void heartbeat(struct work_struct *wrk) container_of(wrk, typeof(*engine), heartbeat.work.work); struct intel_context *ce = engine->kernel_context; struct i915_request *rq; + unsigned long serial; /* Just in case everything has gone horribly wrong, give it a kick */ intel_engine_flush_submission(engine); @@ -122,10 +123,19 @@ static void heartbeat(struct work_struct *wrk) goto out; } - if (engine->wakeref_serial == engine->serial) + serial = READ_ONCE(engine->serial); + if (engine->wakeref_serial == serial) goto out; - mutex_lock(&ce->timeline->mutex); + if (!mutex_trylock(&ce->timeline->mutex)) { + /* Unable to lock the kernel timeline, is the engine stuck? */ + if (xchg(&engine->heartbeat.blocked, serial) == serial) + intel_gt_handle_error(engine->gt, engine->mask, + I915_ERROR_CAPTURE, + "no heartbeat on %s", + engine->name); + goto out; + } intel_context_enter(ce); rq = __i915_request_create(ce, GFP_NOWAIT | __GFP_NOWARN); |