struct uart_8250_dma *dma = p->dma;
struct circ_buf *xmit = &p->port.state->xmit;
unsigned long flags;
+ int ret;
dma_sync_single_for_cpu(dma->txchan->device->dev, dma->tx_addr,
UART_XMIT_SIZE, DMA_TO_DEVICE);
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(&p->port);
- if (!uart_circ_empty(xmit) && !uart_tx_stopped(&p->port)) {
- int ret;
-
- ret = serial8250_tx_dma(p);
- if (ret) {
- dma->tx_err = 1;
- p->ier |= UART_IER_THRI;
- serial_port_out(&p->port, UART_IER, p->ier);
- }
+ ret = serial8250_tx_dma(p);
+ if (ret) {
+ dma->tx_err = 1;
+ p->ier |= UART_IER_THRI;
+ serial_port_out(&p->port, UART_IER, p->ier);
}
spin_unlock_irqrestore(&p->port.lock, flags);
dma->tx_err = 1;
return ret;
}
-EXPORT_SYMBOL_GPL(serial8250_tx_dma);
int serial8250_rx_dma(struct uart_8250_port *p, unsigned int iir)
{
return 0;
}
-EXPORT_SYMBOL_GPL(serial8250_rx_dma);
int serial8250_request_dma(struct uart_8250_port *p)
{