diff options
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/stm32-usart.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c index 8f032e77b954..848e063db2ae 100644 --- a/drivers/tty/serial/stm32-usart.c +++ b/drivers/tty/serial/stm32-usart.c @@ -209,19 +209,22 @@ static unsigned long stm32_usart_get_char(struct uart_port *port, u32 *sr, return c; } -static void stm32_usart_receive_chars(struct uart_port *port, bool threaded) +static void stm32_usart_receive_chars(struct uart_port *port, bool irqflag) { struct tty_port *tport = &port->state->port; struct stm32_port *stm32_port = to_stm32_port(port); const struct stm32_usart_offsets *ofs = &stm32_port->info->ofs; - unsigned long c; + unsigned long c, flags; u32 sr; char flag; - spin_lock(&port->lock); + if (irqflag) + spin_lock_irqsave(&port->lock, flags); + else + spin_lock(&port->lock); while (stm32_usart_pending_rx(port, &sr, &stm32_port->last_res, - threaded)) { + irqflag)) { sr |= USART_SR_DUMMY_RX; flag = TTY_NORMAL; @@ -275,7 +278,10 @@ static void stm32_usart_receive_chars(struct uart_port *port, bool threaded) uart_insert_char(port, sr, USART_SR_ORE, c, flag); } - uart_unlock_and_check_sysrq(port); + if (irqflag) + uart_unlock_and_check_sysrq_irqrestore(port, irqflag); + else + uart_unlock_and_check_sysrq(port); tty_flip_buffer_push(tport); } @@ -496,10 +502,9 @@ static irqreturn_t stm32_usart_interrupt(int irq, void *ptr) static irqreturn_t stm32_usart_threaded_interrupt(int irq, void *ptr) { struct uart_port *port = ptr; - struct stm32_port *stm32_port = to_stm32_port(port); - if (stm32_port->rx_ch) - stm32_usart_receive_chars(port, true); + /* Receiver timeout irq for DMA RX */ + stm32_usart_receive_chars(port, false); return IRQ_HANDLED; } |