diff --git a/drivers/tty/serial/8250/8250_dma.c b/drivers/tty/serial/8250/8250_dma.c index bfa1a857f3ffab6bd039e532c68fcf85c1afb0d4..871c40c655ecaf4f9c3f1f181b023e4ef066d3fd 100644 --- a/drivers/tty/serial/8250/8250_dma.c +++ b/drivers/tty/serial/8250/8250_dma.c @@ -61,6 +61,18 @@ static void __dma_rx_complete(void *param) tty_flip_buffer_push(tty_port); } +static void dma_rx_complete(void *param) +{ + struct uart_8250_port *p = param; + struct uart_8250_dma *dma = p->dma; + unsigned long flags; + + spin_lock_irqsave(&p->port.lock, flags); + if (dma->rx_running) + __dma_rx_complete(p); + spin_unlock_irqrestore(&p->port.lock, flags); +} + int serial8250_tx_dma(struct uart_8250_port *p) { struct uart_8250_dma *dma = p->dma; @@ -126,7 +138,7 @@ int serial8250_rx_dma(struct uart_8250_port *p) return -EBUSY; dma->rx_running = 1; - desc->callback = __dma_rx_complete; + desc->callback = dma_rx_complete; desc->callback_param = p; dma->rx_cookie = dmaengine_submit(desc);