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drm/radeon: fix lockup when BOs aren't part of the VM on release

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If we unmap BOs before releasing them them the intervall tree locks
up because we try to remove an entry not inside the tree.

Based on a patch from Michel Dänzer.

Signed-off-by: Christian König <christian.koenig@amd.com>
CC: stable@vger.kernel.org
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2015-04-27 17:04:34 +02:00 committed by Alex Deucher
parent cd17e02ff4
commit 26d4d129b6
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/radeon/radeon_vm.c
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@ -1107,7 +1107,8 @@ void radeon_vm_bo_rmv(struct radeon_device *rdev,
list_del(&bo_va->bo_list);
mutex_lock(&vm->mutex);
interval_tree_remove(&bo_va->it, &vm->va);
if (bo_va->it.start || bo_va->it.last)
interval_tree_remove(&bo_va->it, &vm->va);
spin_lock(&vm->status_lock);
list_del(&bo_va->vm_status);