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serial: tegra: clear tx_in_progress in flush func

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Cleared tx_in_progress when tegra_uart_flush_buffer is called.
If tegra_uart_flush_buffer is called before complete to transmit
through DMA, next transmit could not be started because
tx_in_progress is not cleared.

Bug 3098159

Change-Id: I4b6b001314479313d7854d04a10d8394357a37cf
Signed-off-by: Alvin Park <apark@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-4.9/+/2405363
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: automaticguardword <automaticguardword@nvidia.com>
Reviewed-by: Hardik T Shah <hardikts@nvidia.com>
Reviewed-by: Phoenix Jung <pjung@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Signed-off-by: CTCaer <ctcaer@gmail.com>
This commit is contained in:
Alvin Park
2020-08-28 17:31:22 +09:00
committed by Thomas Makin
parent 1f47e5c13e
commit eb6f6367f5
1 changed files with 4 additions and 2 deletions
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6
drivers/tty/serial/serial-tegra.c
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@@ -4,7 +4,7 @@
*
* High-speed serial driver for NVIDIA Tegra SoCs
*
* Copyright (c) 2012-2019, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2012-2020, NVIDIA CORPORATION. All rights reserved.
*
* Author: Laxman Dewangan <ldewangan@nvidia.com>
*/
@@ -1260,8 +1260,10 @@ static void tegra_uart_flush_buffer(struct uart_port *u)
struct tegra_uart_port *tup = to_tegra_uport(u);
tup->tx_bytes = 0;
if (tup->tx_dma_chan)
if (tup->tx_dma_chan) {
dmaengine_terminate_all(tup->tx_dma_chan);
tup->tx_in_progress = 0;
}
}
static void tegra_uart_shutdown(struct uart_port *u)