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tty: serial: fsl_lpuart: remove the dev.coherent_dma_mask zero setting

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By default, .of_dma_configure() init dev.coherent_dma_mask to BIT(32) that
match the eDMA address range. If re-init dev.coherent_dma_mask to zero, then
streaming dma mapping will go swiotlb dma_map, if swiotlb is not initalized
then it causes mapping failed.

Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Link: https://lore.kernel.org/r/20190717051930.15514-2-fugang.duan@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Fugang Duan 2019-07-17 13:19:26 +08:00 committed by Greg Kroah-Hartman
parent df60a8af84
commit 38eb523461
1 changed files with 0 additions and 2 deletions
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2
drivers/tty/serial/fsl_lpuart.c
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@ -2320,8 +2320,6 @@ static int lpuart_probe(struct platform_device *pdev)
if (!sport)
return -ENOMEM;
pdev->dev.coherent_dma_mask = 0;
ret = of_alias_get_id(np, "serial");
if (ret < 0) {
ret = ida_simple_get(&fsl_lpuart_ida, 0, UART_NR, GFP_KERNEL);