diff options
| author | Felix Kuehling <Felix.Kuehling@amd.com> | 2016-01-14 00:35:08 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2016-02-16 17:17:14 -0500 |
| commit | fa5b5000308136ad61a33126d8ad380cf1fef016 (patch) | |
| tree | efe50fcd92ab123100bc50ad0e6e62475b0d7316 /drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c | |
| parent | 477d9f0ea6ef6c1501b32434dc06ce3fbbf9c200 (diff) | |
drm/amdgpu: Fix race condition in MMU notifier release
The release notifier can get called a second time from
mmu_notifier_unregister depending on a race between
__mmu_notifier_release and amdgpu_mn_destroy. Use
mmu_notifier_unregister_no_release to avoid this.
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c index 61f0e3c3172a..1b2105ca5af1 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c @@ -86,7 +86,7 @@ static void amdgpu_mn_destroy(struct work_struct *work) } mutex_unlock(&adev->mn_lock); up_write(&rmn->mm->mmap_sem); - mmu_notifier_unregister(&rmn->mn, rmn->mm); + mmu_notifier_unregister_no_release(&rmn->mn, rmn->mm); kfree(rmn); } |