From 953cdcf557815c370e1e6b8e9125b6453c01e7c3 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Sun, 10 Nov 2019 18:57:54 +0000
Subject: drm/i915: Taint the kernel on dumping the GEM ftrace buffer
Git-commit: 7a73e671acbaf00ad6aa4ee0e3f39e3c9a9ef563
Patch-mainline: v5.6-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322

As the ftrace buffer is single shot, once dumped it will not update. As
such, it only provides information for the first bug and all subsequent
bugs are noise. The goal of CI is to have zero bugs, so taint the kernel
causing CI to reboot the machine; fix the bug and move on.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191110185806.17413-13-chris@chris-wilson.co.uk
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/i915/i915_gem.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.h b/drivers/gpu/drm/i915/i915_gem.h
index 5ff051764373..c7985767296a 100644
--- a/drivers/gpu/drm/i915/i915_gem.h
+++ b/drivers/gpu/drm/i915/i915_gem.h
@@ -68,9 +68,10 @@ struct drm_i915_private;
 	pr_err(__VA_ARGS__);						\
 	trace_printk(__VA_ARGS__);					\
 } while (0)
-#define GEM_TRACE_DUMP() ftrace_dump(DUMP_ALL)
+#define GEM_TRACE_DUMP() \
+	do { ftrace_dump(DUMP_ALL); add_taint_for_CI(TAINT_WARN); } while (0)
 #define GEM_TRACE_DUMP_ON(expr) \
-	do { if (expr) ftrace_dump(DUMP_ALL); } while (0)
+	do { if (expr) GEM_TRACE_DUMP(); } while (0)
 #else
 #define GEM_TRACE(...) do { } while (0)
 #define GEM_TRACE_ERR(...) do { } while (0)
-- 
2.28.0