提交 937c3471 编写于 作者: F Francisco Jerez

drm/nouveau: Avoid potential race between nouveau_fence_update() and context takedown.

Signed-off-by: NFrancisco Jerez <currojerez@riseup.net>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>
上级 a8b214f0
无相关合并请求
......@@ -77,6 +77,8 @@ nouveau_fence_update(struct nouveau_channel *chan)
spin_lock(&chan->fence.lock);
/* Fetch the last sequence if the channel is still up and running */
if (likely(!list_empty(&chan->fence.pending))) {
if (USE_REFCNT(dev))
sequence = nvchan_rd32(chan, 0x48);
else
......@@ -85,6 +87,7 @@ nouveau_fence_update(struct nouveau_channel *chan)
if (chan->fence.sequence_ack == sequence)
goto out;
chan->fence.sequence_ack = sequence;
}
list_for_each_entry_safe(fence, tmp, &chan->fence.pending, entry) {
sequence = fence->sequence;
......
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