Commit 91fac86d authored Jun 25, 2020 by Lionel Landwerlin Committed by Christian König Jul 02, 2020

Revert "dma-buf: Report signaled links inside dma-fence-chain"



This reverts commit 5de376bb.

This change breaks synchronization of a timeline.
dma_fence_chain_find_seqno() might be a bit of a confusing name but
this function is not trying to find a particular seqno, is supposed to
give a fence to wait on for a particular point in the timeline.

In a timeline, a particular value is reached when all the points up to
and including that value have signaled.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/372958/


Signed-off-by: Christian König <christian.koenig@amd.com>

parent 55dd37e5

drivers/dma-buf/dma-fence-chain.c

+0 −7

Original line number	Diff line number	Diff line
		@@ -99,12 +99,6 @@ int dma_fence_chain_find_seqno(struct dma_fence **pfence, uint64_t seqno)
		return -EINVAL;

		dma_fence_chain_for_each(*pfence, &chain->base) {
		if ((pfence)->seqno < seqno) { / already signaled */
		dma_fence_put(*pfence);
		*pfence = NULL;
		break;
		}

		if ((*pfence)->context != chain->base.context \|\|
		to_dma_fence_chain(*pfence)->prev_seqno < seqno)
		break;
		@@ -228,7 +222,6 @@ EXPORT_SYMBOL(dma_fence_chain_ops);
		* @chain: the chain node to initialize
		* @prev: the previous fence
		* @fence: the current fence
		* @seqno: the sequence number (syncpt) of the fence within the chain
		*
		* Initialize a new chain node and either start a new chain or add the node to
		* the existing chain of the previous fence.

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