Commit eca84e99 authored Oct 10, 2016 by Andy Shevchenko Committed by Greg Kroah-Hartman Oct 27, 2016

serial: 8250_lpss: Try to enable Memory-Write-Invalidate



Enable MWI mechanism if PCI bus master supports it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 3f3a4695

drivers/tty/serial/8250/8250_lpss.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -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;