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drm/i915/selftests: Hold rpm for unparking

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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: 932cac10c8 ("drm/i915/selftests: Prevent background reaping of active objects")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180809063449.4474-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2018-08-09 07:34:49 +01:00
parent d60996ab43
commit 7b5ee80a5d
1 changed files with 14 additions and 6 deletions
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20
drivers/gpu/drm/i915/selftests/i915_gem_object.c
View file

@ -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 */