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Commit 658c9d2b authored by Robert Baldyga's avatar Robert Baldyga Committed by Greg Kroah-Hartman
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serial: samsung: alloc dma stucture in ourport 



When we have "dmas" property in serial node in device-tree, we do
memory alocation for dma structure which will be used in DMA handling
code.

Based on previous work of Sylwester Nawrocki and Lukasz Czerwinski.

Signed-off-by: default avatarRobert Baldyga <r.baldyga@samsung.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7bb6b2f6

drivers/tty/serial/samsung.c

+12 −0
Original line number Diff line number Diff line
@@ -1209,6 +1209,18 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport, 
	ret = platform_get_irq(platdev, 1);

	if (ret > 0)

		ourport->tx_irq = ret;

	/*

	 * DMA is currently supported only on DT platforms, if DMA properties

	 * are specified.

	 */

	if (platdev->dev.of_node && of_find_property(platdev->dev.of_node,

						     "dmas", NULL)) {

		ourport->dma = devm_kzalloc(port->dev,

					    sizeof(*ourport->dma),

					    GFP_KERNEL);

		if (!ourport->dma)

			return -ENOMEM;

	}



	ourport->clk	= clk_get(&platdev->dev, "uart");

	if (IS_ERR(ourport->clk)) {