[PATCH 1/1] NTB: ntb_transport: replace direct ->device_prep*() calls with standard DMA engine API

From: Frank . Li

Date: Thu Sep 17 2026 - 15:29:44 EST


From: Frank Li <Frank.Li@xxxxxxx>

DMA engine consumers must not call the channel's device_prep_*() function
pointers directly. Use the standard dmaengine wrapper APIs instead.

Assisted-by: LLM
Signed-off-by: Frank Li <Frank.Li@xxxxxxx>
---
drivers/ntb/ntb_transport.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index f9caa1a653c5b..45144abfb7aad 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -1551,9 +1551,9 @@ static int ntb_async_rx_submit(struct ntb_queue_entry *entry, void *offset)

unmap->from_cnt = 1;

- txd = device->device_prep_dma_memcpy(chan, unmap->addr[1],
- unmap->addr[0], len,
- DMA_PREP_INTERRUPT);
+ txd = dmaengine_prep_dma_memcpy(chan, unmap->addr[1],
+ unmap->addr[0], len,
+ DMA_PREP_INTERRUPT);
if (!txd)
goto err_get_unmap;

@@ -1884,8 +1884,8 @@ static int ntb_async_tx_submit(struct ntb_transport_qp *qp,

unmap->to_cnt = 1;

- txd = device->device_prep_dma_memcpy(chan, dest, unmap->addr[0], len,
- DMA_PREP_INTERRUPT);
+ txd = dmaengine_prep_dma_memcpy(chan, dest, unmap->addr[0], len,
+ DMA_PREP_INTERRUPT);
if (!txd)
goto err_get_unmap;

--
2.43.0