Merge branch 'topic/pl330' into for-linus

drivers/dma/pl330.c

@@ -2272,7 +2272,7 @@ pl330_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
 {
 	enum dma_status ret;
 	unsigned long flags;
-	struct dma_pl330_desc *desc, *running = NULL;
+	struct dma_pl330_desc *desc, *running = NULL, *last_enq = NULL;
 	struct dma_pl330_chan *pch = to_pchan(chan);
 	unsigned int transferred, residual = 0;
 
@@ -2285,10 +2285,13 @@ pl330_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
 		goto out;
 
 	spin_lock_irqsave(&pch->lock, flags);
+	spin_lock(&pch->thread->dmac->lock);
 
 	if (pch->thread->req_running != -1)
 		running = pch->thread->req[pch->thread->req_running].desc;
 
+	last_enq = pch->thread->req[pch->thread->lstenq].desc;
+
 	/* Check in pending list */
 	list_for_each_entry(desc, &pch->work_list, node) {
 		if (desc->status == DONE)
@@ -2296,6 +2299,15 @@ pl330_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
 		else if (running && desc == running)
 			transferred =
 				pl330_get_current_xferred_count(pch, desc);
+		else if (desc->status == BUSY)
+			/*
+			 * Busy but not running means either just enqueued,
+			 * or finished and not yet marked done
+			 */
+			if (desc == last_enq)
+				transferred = 0;
+			else
+				transferred = desc->bytes_requested;
 		else
 			transferred = 0;
 		residual += desc->bytes_requested - transferred;
@@ -2316,6 +2328,7 @@ pl330_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
 		if (desc->last)
 			residual = 0;
 	}
+	spin_unlock(&pch->thread->dmac->lock);
 	spin_unlock_irqrestore(&pch->lock, flags);
 
 out: