[Intel-gfx] [PATCH v3 19/28] drm/i915: Connect requests to rings at creation not submission

[John.C.Harrison at Intel.com]

From: John Harrison <John.C.Harrison at Intel.com>

It makes a lot more sense (and makes future seqno -> request conversion patches
simpler) to fill in the 'ring' field of the request structure at the point of
creation rather than submission. Given that the request structure is assigned by
ring specific code and thus is locked to a ring from the start, there really is
no reason to defer this assignment.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison at Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel at intel.com>
---
 drivers/gpu/drm/i915/i915_gem.c         |    1 -
 drivers/gpu/drm/i915/intel_lrc.c        |    1 +
 drivers/gpu/drm/i915/intel_ringbuffer.c |    1 +
 3 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 69bddcb..dd879dd 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2463,7 +2463,6 @@ int __i915_add_request(struct intel_engine_cs *ring,
 			return ret;
 	}
 
-	request->ring = ring;
 	request->head = request_start;
 	request->tail = request_ring_position;
 
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 4cd02e8..0acb448 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -898,6 +898,7 @@ static int logical_ring_alloc_request(struct intel_engine_cs *ring,
 	}
 
 	kref_init(&request->ref);
+	request->ring = ring;
 
 	ret = i915_gem_get_seqno(ring->dev, &request->seqno);
 	if (ret) {
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 04b6d94..5a1e6fe 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -2046,6 +2046,7 @@ intel_ring_alloc_request(struct intel_engine_cs *ring)
 		return -ENOMEM;
 
 	kref_init(&request->ref);
+	request->ring = ring;
 
 	ret = i915_gem_get_seqno(ring->dev, &request->seqno);
 	if (ret) {
-- 
1.7.9.5