Commit b31245b9 authored by Pradeep Goudagunta's avatar Pradeep Goudagunta Committed by Greg Kroah-Hartman

serial: tegra: ack the rx dma desc after transfer terminated

The Rx dma descriptor allocated without the DMA_ACK flags so that
once after tarnsfer done or terminated, client can ack the descriptor
to free it for later use.

If the Rx DMA is terminated for some reason then rx-dma descriptor
is not getting acked which causes the memory leak and list of usage
desc to grow continuously.

Hence, acknowledge the rx-dma descriptor once transfer is terminated
to avoid memory leak and desc list to grow.
Signed-off-by: default avatarLaxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 5e3dbfca
...@@ -602,6 +602,7 @@ static void tegra_uart_handle_rx_dma(struct tegra_uart_port *tup, ...@@ -602,6 +602,7 @@ static void tegra_uart_handle_rx_dma(struct tegra_uart_port *tup,
dmaengine_terminate_all(tup->rx_dma_chan); dmaengine_terminate_all(tup->rx_dma_chan);
dmaengine_tx_status(tup->rx_dma_chan, tup->rx_cookie, &state); dmaengine_tx_status(tup->rx_dma_chan, tup->rx_cookie, &state);
async_tx_ack(tup->rx_dma_desc);
count = tup->rx_bytes_requested - state.residue; count = tup->rx_bytes_requested - state.residue;
/* If we are here, DMA is stopped */ /* If we are here, DMA is stopped */
......
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