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path: root/drivers/dma/tegra20-apb-dma.c
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Diffstat (limited to 'drivers/dma/tegra20-apb-dma.c')
-rw-r--r--drivers/dma/tegra20-apb-dma.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c
index 3722b9d8d9fe..4eaf92b2b886 100644
--- a/drivers/dma/tegra20-apb-dma.c
+++ b/drivers/dma/tegra20-apb-dma.c
@@ -288,7 +288,7 @@ static struct tegra_dma_desc *tegra_dma_desc_get(
/* Do not allocate if desc are waiting for ack */
list_for_each_entry(dma_desc, &tdc->free_dma_desc, node) {
- if (async_tx_test_ack(&dma_desc->txd)) {
+ if (async_tx_test_ack(&dma_desc->txd) && !dma_desc->cb_count) {
list_del(&dma_desc->node);
spin_unlock_irqrestore(&tdc->lock, flags);
dma_desc->txd.flags = 0;
@@ -635,7 +635,10 @@ static void handle_cont_sngl_cycle_dma_done(struct tegra_dma_channel *tdc,
sgreq = list_first_entry(&tdc->pending_sg_req, typeof(*sgreq), node);
dma_desc = sgreq->dma_desc;
- dma_desc->bytes_transferred += sgreq->req_len;
+ /* if we dma for long enough the transfer count will wrap */
+ dma_desc->bytes_transferred =
+ (dma_desc->bytes_transferred + sgreq->req_len) %
+ dma_desc->bytes_requested;
/* Callback need to be call */
if (!dma_desc->cb_count)
@@ -752,10 +755,6 @@ static int tegra_dma_terminate_all(struct dma_chan *dc)
bool was_busy;
spin_lock_irqsave(&tdc->lock, flags);
- if (list_empty(&tdc->pending_sg_req)) {
- spin_unlock_irqrestore(&tdc->lock, flags);
- return 0;
- }
if (!tdc->busy)
goto skip_dma_stop;