Double check that the i915_active is finally idle after waiting, and flushing its callback, just in case we need to re-activate it, for example to keep the vma alive a bit longer due to last minute HW activity (e.g. saving the context before unbinding).
Closes: https://gitlab.freedesktop.org/drm/intel/issues/530 Signed-off-by: Chris Wilson <[email protected]> --- drivers/gpu/drm/i915/i915_active.c | 38 ++++++++++++++++++------------ 1 file changed, 23 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_active.c b/drivers/gpu/drm/i915/i915_active.c index ace55d5d4ca7..204564944dde 100644 --- a/drivers/gpu/drm/i915/i915_active.c +++ b/drivers/gpu/drm/i915/i915_active.c @@ -448,17 +448,11 @@ static void enable_signaling(struct i915_active_fence *active) dma_fence_put(fence); } -int i915_active_wait(struct i915_active *ref) +static int flush_lazy_signals(struct i915_active *ref) { struct active_node *it, *n; int err = 0; - might_sleep(); - - if (!i915_active_acquire_if_busy(ref)) - return 0; - - /* Flush lazy signals */ enable_signaling(&ref->excl); rbtree_postorder_for_each_entry_safe(it, n, &ref->tree, node) { if (is_barrier(&it->base)) /* unconnected idle barrier */ @@ -466,17 +460,31 @@ int i915_active_wait(struct i915_active *ref) enable_signaling(&it->base); } - /* Any fence added after the wait begins will not be auto-signaled */ - i915_active_release(ref); - if (err) - return err; + return err; +} - if (wait_var_event_interruptible(ref, i915_active_is_idle(ref))) - return -EINTR; +int i915_active_wait(struct i915_active *ref) +{ + might_sleep(); - flush_work(&ref->work); - return 0; + do { + int err; + + if (!i915_active_acquire_if_busy(ref)) + return 0; + + /* Any fence added late will not be auto-signaled */ + err = flush_lazy_signals(ref); + i915_active_release(ref); + if (err) + return err; + + if (wait_var_event_interruptible(ref, i915_active_is_idle(ref))) + return -EINTR; + + flush_work(&ref->work); + } while (1); } int i915_request_await_active(struct i915_request *rq, struct i915_active *ref) -- 2.25.0 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
