drm/i915: Move the special case wait-request handling to its one caller

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470293567-10811-19-git-send-email-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/i915_gem_request.c

@@ -731,28 +731,3 @@ int __i915_wait_request(struct drm_i915_gem_request *req,
 
 	return ret;
 }
-
-/**
- * Waits for a request to be signaled, and cleans up the
- * request and object lists appropriately for that event.
- */
-int i915_wait_request(struct drm_i915_gem_request *req)
-{
-	int ret;
-
-	lockdep_assert_held(&req->i915->drm.struct_mutex);
-	GEM_BUG_ON(list_empty(&req->link));
-
-	ret = __i915_wait_request(req,
-				  req->i915->mm.interruptible,
-				  NULL,
-				  NULL);
-	if (ret)
-		return ret;
-
-	/* If the GPU hung, we want to keep the requests to find the guilty. */
-	if (!i915_reset_in_progress(&req->i915->gpu_error))
-		i915_gem_request_retire_upto(req);
-
-	return 0;
-}

drivers/gpu/drm/i915/i915_gem_request.h

@@ -220,10 +220,6 @@ int __i915_wait_request(struct drm_i915_gem_request *req,
 			struct intel_rps_client *rps)
 	__attribute__((nonnull(1)));
 
-int __must_check
-i915_wait_request(struct drm_i915_gem_request *req)
-	__attribute__((nonnull));
-
 static inline u32 intel_engine_get_seqno(struct intel_engine_cs *engine);
 
 /**

drivers/gpu/drm/i915/intel_ringbuffer.c

@@ -2269,6 +2269,7 @@ static int wait_for_space(struct drm_i915_gem_request *req, int bytes)
 {
 	struct intel_ring *ring = req->ring;
 	struct drm_i915_gem_request *target;
+	int ret;
 
 	intel_ring_update_space(ring);
 	if (ring->space >= bytes)
@@ -2298,7 +2299,18 @@ static int wait_for_space(struct drm_i915_gem_request *req, int bytes)
 	if (WARN_ON(&target->ring_link == &ring->request_list))
 		return -ENOSPC;
 
-	return i915_wait_request(target);
+	ret = __i915_wait_request(target, true, NULL, NULL);
+	if (ret)
+		return ret;
+
+	if (i915_reset_in_progress(&target->i915->gpu_error))
+		return -EAGAIN;
+
+	i915_gem_request_retire_upto(target);
+
+	intel_ring_update_space(ring);
+	GEM_BUG_ON(ring->space < bytes);
+	return 0;
 }
 
 int intel_ring_begin(struct drm_i915_gem_request *req, int num_dwords)
@@ -2336,10 +2348,6 @@ int intel_ring_begin(struct drm_i915_gem_request *req, int num_dwords)
 		int ret = wait_for_space(req, wait_bytes);
 		if (unlikely(ret))
 			return ret;
-
-		intel_ring_update_space(ring);
-		if (unlikely(ring->space < wait_bytes))
-			return -EAGAIN;
 	}
 
 	if (unlikely(need_wrap)) {