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drm/radeon: fix userptr lockup 

We shouldn't try to reserve and wait for a BO that isn't bound. Otherwise
we can run into a deadlock if we have a fault during binding the BO.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2015-05-05 09:52:12 +02:00 committed by Alex Deucher
parent db12973cd5
commit 247c405098
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/radeon/radeon_mn.c
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@ -142,6 +142,9 @@ static void radeon_mn_invalidate_range_start(struct mmu_notifier *mn,
list_for_each_entry(bo, &node->bos, mn_list) {
if (!bo->tbo.ttm || bo->tbo.ttm->state != tt_bound)
continue;
r = radeon_bo_reserve(bo, true);
if (r) {
DRM_ERROR("(%ld) failed to reserve user bo\n", r);