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bufferqueue: workaround: allow NULL fence with queueBuffer (DO NOT MERGE) 

On one device there is a bug, not yet root-caused, that causes fence
fds to not make it across binder from producer to consumer in the
IGraphicBufferProducer::queueBuffer call. Rather than returning an
error, which the producer typically treats as a fatal error, this
change allows the buffer to be queued with no fence. This avoids an
application crash at the risk of (likely single-frame) visible
corruption.

Bug: 17946343
Change-Id: I9ca89f94098c455e1e90f5f58d5336c936b04a9c
This commit is contained in:
Jesse Hall 2014-10-18 21:47:04 -07:00
parent 60fd3feeca
commit 5b0cbcf946
1 changed files with 6 additions and 1 deletions
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7
libs/gui/BufferQueueProducer.cpp
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@ -522,7 +522,12 @@ status_t BufferQueueProducer::queueBuffer(int slot,
if (fence == NULL) {
BQ_LOGE("queueBuffer: fence is NULL");
return BAD_VALUE;
// Temporary workaround for b/17946343: soldier-on instead of returning an error. This
// prevents the client from dying, at the risk of visible corruption due to hwcomposer
// reading the buffer before the producer is done rendering it. Unless the buffer is the
// last frame of an animation, the corruption will be transient.
fence = Fence::NO_FENCE;
// return BAD_VALUE;
}
switch (scalingMode) {