[Intel-gfx] [PATCH 1/2] drm/i915/gt: Mark legacy ring context as lost

[Chris Wilson]

When we reset the legacy ring context, due to potential corruption over
suspend/resume, remove the valid bit so that we avoid loading garbage.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/gt/intel_ring_submission.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_ring_submission.c b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
index a41b43f445b8..1959e3e5b8e9 100644
--- a/drivers/gpu/drm/i915/gt/intel_ring_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
@@ -602,6 +602,7 @@ static int ring_context_pin(struct intel_context *ce, void *unused)
 static void ring_context_reset(struct intel_context *ce)
 {
 	intel_ring_reset(ce->ring, ce->ring->emit);
+	__clear_bit(CONTEXT_VALID_BIT, &ce->flags);
 }
 
 static const struct intel_context_ops ring_context_ops = {
-- 
2.20.1