diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2019-06-12 09:52:46 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2019-06-12 12:06:11 +0100 |
| commit | 33df8a7697a08ec96811a1e9bbce45c7cdbbc316 (patch) | |
| tree | 68c4739164b54339de55ee5bb7f3a480f97c953a /drivers/gpu/drm/i915/i915_gem.c | |
| parent | ea60f4bdc4330fc3be90e6a8634b9b912046b09d (diff) | |
drm/i915: Prevent lock-cycles between GPU waits and GPU resets
We cannot allow ourselves to wait on the GPU while holding any lock as we
may need to reset the GPU. While there is not an explicit lock between
the two operations, lockdep cannot detect the dependency. So let's tell
lockdep about the wait/reset dependency with an explicit lockmap.
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: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190612085246.16374-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index e980c1ee3dcf..24f0f3db1bfb 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1782,6 +1782,7 @@ static void i915_gem_init__mm(struct drm_i915_private *i915) int i915_gem_init_early(struct drm_i915_private *dev_priv) { + static struct lock_class_key reset_key; int err; intel_gt_pm_init(dev_priv); @@ -1789,6 +1790,8 @@ int i915_gem_init_early(struct drm_i915_private *dev_priv) INIT_LIST_HEAD(&dev_priv->gt.active_rings); INIT_LIST_HEAD(&dev_priv->gt.closed_vma); spin_lock_init(&dev_priv->gt.closed_lock); + lockdep_init_map(&dev_priv->gt.reset_lockmap, + "i915.reset", &reset_key, 0); i915_gem_init__mm(dev_priv); i915_gem_init__pm(dev_priv); |