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| author |  Andy Shevchenko <andriy.shevchenko@linux.intel.com>
| 2016-10-10 11:27:19 +0300 |
|---|---|---|
| committer |  Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| 2016-10-27 16:27:24 +0200 |
| commit | eca84e99d1afac871cd85b3444862f36fa8bbb37 (patch) | |
| tree | 604a5e22d2d33f5a7a8fc3d4de1c6dff1ee9bfb5 /drivers/tty/serial | |
| parent | serial: 8250_lpss: set PCI master only for private DMA (diff) | |
| download | linux-eca84e99d1afac871cd85b3444862f36fa8bbb37.tar.gz linux-eca84e99d1afac871cd85b3444862f36fa8bbb37.tar.bz2 linux-eca84e99d1afac871cd85b3444862f36fa8bbb37.zip | |
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>
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/8250/8250_lpss.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_lpss.c b/drivers/tty/serial/8250/8250_lpss.c index 353c90ea50b1..ac2a34ecfd66 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; |