diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_userptr.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_userptr.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_userptr.c b/drivers/gpu/drm/i915/i915_gem_userptr.c index cdc9be799eee..e26b23171b56 100644 --- a/drivers/gpu/drm/i915/i915_gem_userptr.c +++ b/drivers/gpu/drm/i915/i915_gem_userptr.c @@ -221,15 +221,17 @@ i915_mmu_notifier_find(struct i915_mm_struct *mm) /* Protected by mm_lock */ mm->mn = fetch_and_zero(&mn); } - } else { - /* someone else raced and successfully installed the mmu - * notifier, we can cancel our own errors */ + } else if (mm->mn) { + /* + * Someone else raced and successfully installed the mmu + * notifier, we can cancel our own errors. + */ err = 0; } mutex_unlock(&mm->i915->mm_lock); up_write(&mm->mm->mmap_sem); - if (mn) { + if (mn && !IS_ERR(mn)) { destroy_workqueue(mn->wq); kfree(mn); } |