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pch_uart: don't hardcode PCI slot to get DMA device

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The DMA is a function 0 of the multifunction device where SPI host is attached.
Thus, we may avoid to hardcode PCI slot number.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2014-07-30 18:59:52 +03:00 committed by Greg Kroah-Hartman
parent c62fd1d9f0
commit 8368d6a2b7
1 changed files with 4 additions and 3 deletions
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7
drivers/tty/serial/pch_uart.c
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@ -736,9 +736,10 @@ static void pch_request_dma(struct uart_port *port)
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
dma_dev = pci_get_bus_and_slot(priv->pdev->bus->number,
PCI_DEVFN(0xa, 0)); /* Get DMA's dev
information */
/* Get DMA's dev information */
dma_dev = pci_get_slot(priv->pdev->bus,
PCI_DEVFN(PCI_SLOT(priv->pdev->devfn), 0));
/* Set Tx DMA */
param = &priv->param_tx;
param->dma_dev = &dma_dev->dev;