From: Pradeep Goudagunta <pgoudagunta@xxxxxxxxxx> When channel is require to stop transmit then update the Tx circular buffer only when DMA based transfer is in progress. If there is no DMA based transfer then no need to update the Tx buffer. Signed-off-by: Pradeep Goudagunta <pgoudagunta@xxxxxxxxxx> Signed-off-by: Laxman Dewangan <ldewangan@xxxxxxxxxx> --- drivers/tty/serial/serial-tegra.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c index d5c2a28..117d8d1 100644 --- a/drivers/tty/serial/serial-tegra.c +++ b/drivers/tty/serial/serial-tegra.c @@ -482,6 +482,9 @@ static void tegra_uart_stop_tx(struct uart_port *u) struct dma_tx_state state; int count; + if (tup->tx_in_progress != TEGRA_UART_TX_DMA) + return; + dmaengine_terminate_all(tup->tx_dma_chan); dmaengine_tx_status(tup->tx_dma_chan, tup->tx_cookie, &state); count = tup->tx_bytes_requested - state.residue; -- 1.8.1.5 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
