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drm/radeon: check new address before removing old one 

Otherwise the change isn't atomic.

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 17:04:36 +02:00 committed by Alex Deucher
parent 48afbd70ac
commit c29c0876ec
1 changed files with 17 additions and 14 deletions
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31
drivers/gpu/drm/radeon/radeon_vm.c
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@ -473,6 +473,23 @@ int radeon_vm_bo_set_addr(struct radeon_device *rdev,
}
mutex_lock(&vm->mutex);
soffset /= RADEON_GPU_PAGE_SIZE;
eoffset /= RADEON_GPU_PAGE_SIZE;
if (soffset || eoffset) {
struct interval_tree_node *it;
it = interval_tree_iter_first(&vm->va, soffset, eoffset - 1);
if (it && it != &bo_va->it) {
struct radeon_bo_va *tmp;
tmp = container_of(it, struct radeon_bo_va, it);
/* bo and tmp overlap, invalid offset */
dev_err(rdev->dev, "bo %p va 0x%010Lx conflict with "
"(bo %p 0x%010lx 0x%010lx)\n", bo_va->bo,
soffset, tmp->bo, tmp->it.start, tmp->it.last);
mutex_unlock(&vm->mutex);
return -EINVAL;
}
}
if (bo_va->it.start || bo_va->it.last) {
if (bo_va->addr) {
/* add a clone of the bo_va to clear the old address */
@ -499,21 +516,7 @@ int radeon_vm_bo_set_addr(struct radeon_device *rdev,
bo_va->it.last = 0;
}
soffset /= RADEON_GPU_PAGE_SIZE;
eoffset /= RADEON_GPU_PAGE_SIZE;
if (soffset || eoffset) {
struct interval_tree_node *it;
it = interval_tree_iter_first(&vm->va, soffset, eoffset - 1);
if (it) {
struct radeon_bo_va *tmp;
tmp = container_of(it, struct radeon_bo_va, it);
/* bo and tmp overlap, invalid offset */
dev_err(rdev->dev, "bo %p va 0x%010Lx conflict with "
"(bo %p 0x%010lx 0x%010lx)\n", bo_va->bo,
soffset, tmp->bo, tmp->it.start, tmp->it.last);
mutex_unlock(&vm->mutex);
return -EINVAL;
}
bo_va->it.start = soffset;
bo_va->it.last = eoffset - 1;
interval_tree_insert(&bo_va->it, &vm->va);