diff options
| author | Erwan Le Ray <erwan.leray@st.com> | 2019-05-21 17:45:44 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-27 14:46:35 +0100 |
| commit | 2e0f6b8569f2a2b447a13dfecacd35a6bc3aa421 (patch) | |
| tree | dae58c76124c34750e8ab02c47e12b8629dde6ea /drivers/tty/serial/stm32-usart.c | |
| parent | 58828c8a7ba68580c5683781cfcc644d43c21778 (diff) | |
serial: stm32: fix transmit_chars when tx is stopped
[ Upstream commit b83b957c91f68e53f0dc596e129e8305761f2a32 ]
Disables the tx irq when the transmission is ended and updates stop_tx
conditions for code cleanup.
Fixes: 48a6092fb41f ("serial: stm32-usart: Add STM32 USART Driver")
Signed-off-by: Erwan Le Ray <erwan.leray@st.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/tty/serial/stm32-usart.c')
| -rw-r--r-- | drivers/tty/serial/stm32-usart.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c index c43590077372..a1e31913bcf9 100644 --- a/drivers/tty/serial/stm32-usart.c +++ b/drivers/tty/serial/stm32-usart.c @@ -310,13 +310,8 @@ static void stm32_transmit_chars(struct uart_port *port) return; } - if (uart_tx_stopped(port)) { - stm32_stop_tx(port); - return; - } - - if (uart_circ_empty(xmit)) { - stm32_stop_tx(port); + if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { + stm32_clr_bits(port, ofs->cr1, USART_CR1_TXEIE); return; } @@ -329,7 +324,7 @@ static void stm32_transmit_chars(struct uart_port *port) uart_write_wakeup(port); if (uart_circ_empty(xmit)) - stm32_stop_tx(port); + stm32_clr_bits(port, ofs->cr1, USART_CR1_TXEIE); } static irqreturn_t stm32_interrupt(int irq, void *ptr) |