diff options
| author | Erwan Le Ray <erwan.leray@foss.st.com> | 2021-03-04 17:23:04 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-14 09:50:08 +0200 |
| commit | f765918b334d5a4796eea043ccefed2c49e2ff31 (patch) | |
| tree | 4173deddefb73ccf7ff5fb9ee0301a638df27675 /drivers/tty | |
| parent | a98c0683a3be044b4bf5ef1921183372e8701e18 (diff) | |
serial: stm32: call stm32_transmit_chars locked
[ Upstream commit f16b90c2d9db3e6ac719d1946b9d335ca4ab33f3 ]
stm32_transmit_chars should be called under lock also in tx DMA callback.
Fixes: 3489187204eb ("serial: stm32: adding dma support")
Signed-off-by: Erwan Le Ray <erwan.leray@foss.st.com>
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Link: https://lore.kernel.org/r/20210304162308.8984-10-erwan.leray@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/stm32-usart.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c index c2d87a8a8fe5..a6295897c537 100644 --- a/drivers/tty/serial/stm32-usart.c +++ b/drivers/tty/serial/stm32-usart.c @@ -290,13 +290,16 @@ static void stm32_usart_tx_dma_complete(void *arg) struct uart_port *port = arg; struct stm32_port *stm32port = to_stm32_port(port); const struct stm32_usart_offsets *ofs = &stm32port->info->ofs; + unsigned long flags; dmaengine_terminate_async(stm32port->tx_ch); stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_DMAT); stm32port->tx_dma_busy = false; /* Let's see if we have pending data to send */ + spin_lock_irqsave(&port->lock, flags); stm32_usart_transmit_chars(port); + spin_unlock_irqrestore(&port->lock, flags); } static void stm32_usart_tx_interrupt_enable(struct uart_port *port) |