From 7e44fc289d54aa3f1f37d6c9e5157f79011c6476 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Tue, 26 Sep 2017 11:17:19 +0100
Subject: [PATCH] drm/i915/execlists: Notify context-out for lost requests
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Git-commit: 7e44fc289d54aa3f1f37d6c9e5157f79011c6476
Patch-mainline: v4.15-rc1
References: FATE#322643 bsc#1055900

When cancelling requests, also send the notification to any listeners
(gvt) that the request is no longer scheduled on hw. They may require to
keep the in/out exactly balanced, and so the reuse after the reset may
confuse the listener.

Fixes: 221ab9719bf3 ("drm/i915/execlists: Unwind incomplete requests on resets")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: "Zhenyu Wang" <zhenyuw@linux.intel.com>
Cc: "Wang, Zhi A" <zhi.a.wang@intel.com>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170926101720.9479-1-chris@chris-wilson.co.uk
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/i915/intel_lrc.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -578,7 +578,11 @@ execlist_cancel_port_requests(struct int
 	unsigned int num_ports = ARRAY_SIZE(execlists->port);
 
 	while (num_ports-- && port_isset(port)) {
-		i915_gem_request_put(port_request(port));
+		struct drm_i915_gem_request *rq = port_request(port);
+
+		execlists_context_status_change(rq, INTEL_CONTEXT_SCHEDULE_OUT);
+		i915_gem_request_put(rq);
+
 		memset(port, 0, sizeof(*port));
 		port++;
 	}