From 26d4d129b6042197b4cbc8341c0618f99231af2f Mon Sep 17 00:00:00 2001 From: =?utf8?q?Christian=20K=C3=B6nig?= Date: Mon, 27 Apr 2015 17:04:34 +0200 Subject: [PATCH] drm/radeon: fix lockup when BOs aren't part of the VM on release MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 CC: stable@vger.kernel.org Signed-off-by: Alex Deucher --- drivers/gpu/drm/radeon/radeon_vm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/radeon/radeon_vm.c b/drivers/gpu/drm/radeon/radeon_vm.c index 2a5a4a9e772d..16d8e95abd94 100644 --- a/drivers/gpu/drm/radeon/radeon_vm.c +++ b/drivers/gpu/drm/radeon/radeon_vm.c @@ -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); -- 2.20.1