drm/i915/gt: Stop poking at engine->serial at a high level

In record defaults, if we emit a request we expect a context switck on
parking. We need take no further action, so don't even mess with the low
level engine->serial where it is not warranted.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Andi Shyti <andi.shyti@intel.com>
Acked-by: Andi Shyti <andi.shyti@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191225230703.2498794-1-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
index ec84b5e..e4f7cc7 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_gt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt.c
@@ -410,14 +410,13 @@ static int __engines_record_defaults(struct intel_gt *gt)
                struct intel_context *ce;
                struct i915_request *rq;
 
+               /* We must be able to switch to something! */
+               GEM_BUG_ON(!engine->kernel_context);
+
                err = intel_renderstate_init(&so, engine);
                if (err)
                        goto out;
 
-               /* We must be able to switch to something! */
-               GEM_BUG_ON(!engine->kernel_context);
-               engine->serial++; /* force the kernel context switch */
-
                ce = intel_context_create(engine);
                if (IS_ERR(ce)) {
                        err = PTR_ERR(ce);