diff options
| author | Andy Shevchenko | 2016-10-10 11:27:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2016-10-27 16:27:24 +0200 |
| commit | 3f3a46951e02a89961f47db97624767b5b9befec (patch) | |
| tree | 3ac6d9cf6c5764baaea4cf32ea3be761b466dfb9 /drivers/tty/serial | |
| parent | 0fe07647cc5003307fc4258f0b87239849aff68a (diff) | |
serial: 8250_lpss: set PCI master only for private DMA
There is no need to set PCI bus mastering when device is not doing any DMA.
Though on Intel Quark DMA is a part of UART IP and thus shares same device in
Linux kernel.
Enable bus mastering only for Quark case.
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 | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/tty/serial/8250/8250_lpss.c b/drivers/tty/serial/8250/8250_lpss.c index 886fcf37f291..353c90ea50b1 100644 --- a/drivers/tty/serial/8250/8250_lpss.c +++ b/drivers/tty/serial/8250/8250_lpss.c @@ -183,6 +183,8 @@ static void qrk_serial_setup_dma(struct lpss8250 *lpss, struct uart_port *port) if (ret) return; + pci_set_master(pdev); + /* Special DMA address for UART */ dma->rx_dma_addr = 0xfffff000; dma->tx_dma_addr = 0xfffff000; @@ -280,8 +282,6 @@ static int lpss8250_probe(struct pci_dev *pdev, const struct pci_device_id *id) if (ret) return ret; - pci_set_master(pdev); - lpss = devm_kzalloc(&pdev->dev, sizeof(*lpss), GFP_KERNEL); if (!lpss) return -ENOMEM; |