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Without this, DMA map/unmap/sync bypasses the IOMMU context configured by the eDMA driver. Signed-off-by: Peng Fan Reviewed-by: Frank Li --- drivers/tty/serial/fsl_lpuart.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuar= t.c index b7919c05f0fb8..c8575c9652035 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -491,7 +491,7 @@ static void lpuart_dma_tx(struct lpuart_port *sport) sport->dma_tx_nents =3D kfifo_dma_out_prepare(&tport->xmit_fifo, sgl, ARRAY_SIZE(sport->tx_sgl), sport->dma_tx_bytes); =20 - ret =3D dma_map_sg(chan->device->dev, sgl, sport->dma_tx_nents, + ret =3D dma_map_sg(dmaengine_get_dma_device(chan), sgl, sport->dma_tx_nen= ts, DMA_TO_DEVICE); if (!ret) { dev_err(dev, "DMA mapping error for TX.\n"); @@ -502,7 +502,7 @@ static void lpuart_dma_tx(struct lpuart_port *sport) ret, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT); if (!sport->dma_tx_desc) { - dma_unmap_sg(chan->device->dev, sgl, sport->dma_tx_nents, + dma_unmap_sg(dmaengine_get_dma_device(chan), sgl, sport->dma_tx_nents, DMA_TO_DEVICE); dev_err(dev, "Cannot prepare TX slave DMA!\n"); return; @@ -535,7 +535,7 @@ static void lpuart_dma_tx_complete(void *arg) return; } =20 - dma_unmap_sg(chan->device->dev, sgl, sport->dma_tx_nents, + dma_unmap_sg(dmaengine_get_dma_device(chan), sgl, sport->dma_tx_nents, DMA_TO_DEVICE); =20 uart_xmit_advance(&sport->port, sport->dma_tx_bytes); @@ -606,7 +606,7 @@ static void lpuart_flush_buffer(struct uart_port *port) =20 if (sport->lpuart_dma_tx_use) { if (sport->dma_tx_in_progress) { - dma_unmap_sg(chan->device->dev, &sport->tx_sgl[0], + dma_unmap_sg(dmaengine_get_dma_device(chan), &sport->tx_sgl[0], sport->dma_tx_nents, DMA_TO_DEVICE); sport->dma_tx_in_progress =3D false; } @@ -1176,7 +1176,7 @@ static void lpuart_copy_rx_to_tty(struct lpuart_port = *sport) } =20 /* CPU claims ownership of RX DMA buffer */ - dma_sync_sg_for_cpu(chan->device->dev, &sport->rx_sgl, 1, + dma_sync_sg_for_cpu(dmaengine_get_dma_device(chan), &sport->rx_sgl, 1, DMA_FROM_DEVICE); =20 /* @@ -1237,7 +1237,7 @@ static void lpuart_copy_rx_to_tty(struct lpuart_port = *sport) sport->last_residue =3D state.residue; =20 exit: - dma_sync_sg_for_device(chan->device->dev, &sport->rx_sgl, 1, + dma_sync_sg_for_device(dmaengine_get_dma_device(chan), &sport->rx_sgl, 1, DMA_FROM_DEVICE); =20 uart_port_unlock_irqrestore(&sport->port, flags); @@ -1374,7 +1374,7 @@ static inline int lpuart_start_rx_dma(struct lpuart_p= ort *sport) return -ENOMEM; =20 sg_init_one(&sport->rx_sgl, ring->buf, sport->rx_dma_rng_buf_len); - nent =3D dma_map_sg(chan->device->dev, &sport->rx_sgl, 1, + nent =3D dma_map_sg(dmaengine_get_dma_device(chan), &sport->rx_sgl, 1, DMA_FROM_DEVICE); =20 if (!nent) { @@ -1430,7 +1430,7 @@ static inline int lpuart_start_rx_dma(struct lpuart_p= ort *sport) return 0; =20 err_unmap_sg: - dma_unmap_sg(chan->device->dev, &sport->rx_sgl, 1, DMA_FROM_DEVICE); + dma_unmap_sg(dmaengine_get_dma_device(chan), &sport->rx_sgl, 1, DMA_FROM_= DEVICE); err_free_buf: kfree(ring->buf); ring->buf =3D NULL; @@ -1447,7 +1447,7 @@ static void lpuart_dma_rx_free(struct uart_port *port) if (!sport->dma_idle_int) timer_delete_sync(&sport->lpuart_timer); =20 - dma_unmap_sg(chan->device->dev, &sport->rx_sgl, 1, DMA_FROM_DEVICE); + dma_unmap_sg(dmaengine_get_dma_device(chan), &sport->rx_sgl, 1, DMA_FROM_= DEVICE); kfree(sport->rx_ring.buf); sport->rx_ring.tail =3D 0; sport->rx_ring.head =3D 0; --- base-commit: e6e35979777d646fe3c7c94dca7dd32fb25d45f4 change-id: 20260916-lpuart-dma-9923b7b2e1da Best regards, -- =20 Peng Fan