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| author | Erwan Le Ray <erwan.leray@foss.st.com> | 2021-03-04 19:23:04 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-10 11:34:11 +0300 |
| commit | f16b90c2d9db3e6ac719d1946b9d335ca4ab33f3 (patch) | |
| tree | a8a87a818b9e2e0eae7bbe53ee305a2945990601 /drivers/tty/serial/stm32-usart.c | |
| parent | fb4f2e04ac13e7c400e6b86afbbd314a5a2a7e8d (diff) | |
| download | linux-f16b90c2d9db3e6ac719d1946b9d335ca4ab33f3.tar.xz | |
serial: stm32: call stm32_transmit_chars locked
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>
Diffstat (limited to 'drivers/tty/serial/stm32-usart.c')
| -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 74046ae3a412..2bdd04a47f91 100644 --- a/drivers/tty/serial/stm32-usart.c +++ b/drivers/tty/serial/stm32-usart.c @@ -291,13 +291,16 @@ 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) |