From: Fugang Duan <fugang.duan@xxxxxxx>
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@xxxxxxx>
---
drivers/tty/serial/fsl_lpuart.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 92dad2b..b856d1d 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -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);
--
2.7.4
