| From a19704ab72b9002cfa15d1fc41b051f52ae09c66 Mon Sep 17 00:00:00 2001 |
| From: Sasha Levin <sashal@kernel.org> |
| Date: Thu, 4 Mar 2021 17:23:03 +0100 |
| Subject: serial: stm32: fix tx dma completion, release channel |
| |
| From: Erwan Le Ray <erwan.leray@foss.st.com> |
| |
| [ Upstream commit fb4f2e04ac13e7c400e6b86afbbd314a5a2a7e8d ] |
| |
| This patch add a proper release of dma channels when completing dma tx. |
| |
| Fixes: 3489187204eb ("serial: stm32: adding dma support") |
| Signed-off-by: Erwan Le Ray <erwan.leray@foss.st.com> |
| Link: https://lore.kernel.org/r/20210304162308.8984-9-erwan.leray@foss.st.com |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| Signed-off-by: Sasha Levin <sashal@kernel.org> |
| --- |
| drivers/tty/serial/stm32-usart.c | 1 + |
| 1 file changed, 1 insertion(+) |
| |
| diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c |
| index 44522ddc7e6d..c2d87a8a8fe5 100644 |
| --- a/drivers/tty/serial/stm32-usart.c |
| +++ b/drivers/tty/serial/stm32-usart.c |
| @@ -291,6 +291,7 @@ static void stm32_usart_tx_dma_complete(void *arg) |
| struct stm32_port *stm32port = to_stm32_port(port); |
| const struct stm32_usart_offsets *ofs = &stm32port->info->ofs; |
| |
| + dmaengine_terminate_async(stm32port->tx_ch); |
| stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_DMAT); |
| stm32port->tx_dma_busy = false; |
| |
| -- |
| 2.30.2 |
| |