drm/i915: Rearrange the comments in i915_add_request()

The comments were a little out-of-sequence with the code, forcing the
reader to jump around whilst reading. Whilst moving the comments around,
add one to explain the context reference.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 22be39f..fdeecae 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2062,8 +2062,6 @@ int __i915_add_request(struct intel_ring_buffer *ring,
        request->ring = ring;
        request->head = request_start;
        request->tail = request_ring_position;
-       request->ctx = ring->last_context;
-       request->batch_obj = obj;
 
        /* Whilst this request exists, batch_obj will be on the
         * active_list, and so will hold the active reference. Only when this
@@ -2071,7 +2069,12 @@ int __i915_add_request(struct intel_ring_buffer *ring,
         * inactive_list and lose its active reference. Hence we do not need
         * to explicitly hold another reference here.
         */
+       request->batch_obj = obj;
 
+       /* Hold a reference to the current context so that we can inspect
+        * it later in case a hangcheck error event fires.
+        */
+       request->ctx = ring->last_context;
        if (request->ctx)
                i915_gem_context_reference(request->ctx);