[PATCH] pch_uart: Fix dma_sync_sg_for_device() nents value

Thomas Fourier
2025-06-30T11:42:00Z

The dma_sync_sg_for_device() functions should be called with the same
nents as the dma_map_sg(), not the value the map function returned.

Fixes: da3564ee027e ("pch_uart: add multi-scatter processing")
Signed-off-by: Thomas Fourier <fourier.thomas@gmail.com>
---
drivers/tty/serial/pch_uart.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index 508e8c6f01d4..5aee3fdba8a1 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -954,7 +954,7 @@ static unsigned int dma_handle_tx(struct eg20t_port *priv)
__func__);
return 0;
}
- dma_sync_sg_for_device(port->dev, priv->sg_tx_p, nent, DMA_TO_DEVICE);
+ dma_sync_sg_for_device(port->dev, priv->sg_tx_p, priv->nent, DMA_TO_DEVICE);
priv->desc_tx = desc;
desc->callback = pch_dma_tx_complete;
desc->callback_param = priv;
--
2.43.0