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serial: samsung: Simplify DMA engine initialization code

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dma_request_slave_channel_compat() requires filter function and mask, which
are not needed on device tree based platforms, so simplify the code by
calling the more appropriate dma_request_chan() function. This additionally
gives us proper error handling, because the new function returns error
codes instead of NULL on failure.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Marek Szyprowski
2016-12-16 10:56:53 +01:00
committed by Greg Kroah-Hartman
parent f87fa71e6f
commit ba3d6f8f10
2 changed files with 6 additions and 15 deletions
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4
drivers/tty/serial/samsung.h
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@@ -44,10 +44,6 @@ struct s3c24xx_serial_drv_data {
};
struct s3c24xx_uart_dma {
dma_filter_fn fn;
void *rx_param;
void *tx_param;
unsigned int rx_chan_id;
unsigned int tx_chan_id;