From 3012ea60c57dbdf21206c7e787d6d0cde76a18a7 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Thu, 9 Aug 2018 07:34:49 +0100 Subject: [PATCH] drm/i915/selftests: Hold rpm for unparking The call to i915_gem_unpark() checks that we hold a rpm wakeref before taking a long term wakeref for i915->gt.awake. We should therefore make sure we do hold the wakeref when directly calling unpark to disable the retire worker. Fixes: 932cac10c8fb ("drm/i915/selftests: Prevent background reaping of active objects") Signed-off-by: Chris Wilson Cc: Mika Kuoppala Cc: Matthew Auld Reviewed-by: Mika Kuoppala Link: https://patchwork.freedesktop.org/patch/msgid/20180809063449.4474-1-chris@chris-wilson.co.uk (cherry picked from commit 7b5ee80a5da3ea44c5abff48e3621135ae9d8177) Signed-off-by: Rodrigo Vivi --- drivers/gpu/drm/i915/selftests/i915_gem_object.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_object.c b/drivers/gpu/drm/i915/selftests/i915_gem_object.c index c69cbd5..ba4f322 100644 --- a/drivers/gpu/drm/i915/selftests/i915_gem_object.c +++ b/drivers/gpu/drm/i915/selftests/i915_gem_object.c @@ -499,6 +499,19 @@ static bool assert_mmap_offset(struct drm_i915_private *i915, return err == expected; } +static void disable_retire_worker(struct drm_i915_private *i915) +{ + mutex_lock(&i915->drm.struct_mutex); + if (!i915->gt.active_requests++) { + intel_runtime_pm_get(i915); + i915_gem_unpark(i915); + intel_runtime_pm_put(i915); + } + mutex_unlock(&i915->drm.struct_mutex); + cancel_delayed_work_sync(&i915->gt.retire_work); + cancel_delayed_work_sync(&i915->gt.idle_work); +} + static int igt_mmap_offset_exhaustion(void *arg) { struct drm_i915_private *i915 = arg; @@ -509,12 +522,7 @@ static int igt_mmap_offset_exhaustion(void *arg) int loop, err; /* Disable background reaper */ - mutex_lock(&i915->drm.struct_mutex); - if (!i915->gt.active_requests++) - i915_gem_unpark(i915); - mutex_unlock(&i915->drm.struct_mutex); - cancel_delayed_work_sync(&i915->gt.retire_work); - cancel_delayed_work_sync(&i915->gt.idle_work); + disable_retire_worker(i915); GEM_BUG_ON(!i915->gt.awake); /* Trim the device mmap space to only a page */ -- 2.7.4