Enable MWI mechanism if PCI bus master supports it. Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> --- drivers/tty/serial/8250/8250_lpss.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/serial/8250/8250_lpss.c b/drivers/tty/serial/8250/8250_lpss.c index d5ba991..bd8d20b 100644 --- a/drivers/tty/serial/8250/8250_lpss.c +++ b/drivers/tty/serial/8250/8250_lpss.c @@ -184,6 +184,7 @@ static void qrk_serial_setup_dma(struct lpss8250 *lpss, struct uart_port *port) return; pci_set_master(pdev); + pci_try_set_mwi(pdev); /* Special DMA address for UART */ dma->rx_dma_addr = 0xfffff000; -- 2.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
