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

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);