drm/i915: batch submit seqno off-by-one.

We increment the seqno number between submitting the batch buffer and
the flush/interrupt that demarcates its end, so the tracepoint needs to
reference the incremented value to match the completion event.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 40727d4c2919..b5f9df230d09 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3352,7 +3352,7 @@ i915_dispatch_gem_execbuffer(struct drm_device *dev,
         exec_start = (uint32_t) exec_offset + exec->batch_start_offset;
         exec_len = (uint32_t) exec->batch_len;
 
-        trace_i915_gem_request_submit(dev, dev_priv->mm.next_gem_seqno);
+        trace_i915_gem_request_submit(dev, dev_priv->mm.next_gem_seqno + 1);
 
         count = nbox ? nbox : 1;