diff options
| author | Frank Li <Frank.Li@nxp.com> | 2026-09-17 16:50:12 -0400 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-10-11 15:18:52 -0700 |
| commit | e46277fa8a4f5ae66c87e18bbad028bffe7ac9e9 (patch) | |
| tree | a13c7a7d0d862a136ed34e51d84b254aefc229fd /drivers | |
| parent | 1710e0ef4765d1be8681049b55b94cefcba03858 (diff) | |
| download | linux-next-e46277fa8a4f5ae66c87e18bbad028bffe7ac9e9.tar.gz linux-next-e46277fa8a4f5ae66c87e18bbad028bffe7ac9e9.zip | |
rapidio: use dmaengine_get_dma_device() instead of chan->device->dev
Replace direct dma_chan::device::dev access with the proper
dmaengine_get_dma_device() for consumer API.
chan->device->dev is not always the device used for DMA mapping. Some DMA
engines support per-channel IOMMU mappings, so different channels may use
different DMA devices. dmaengine_get_dma_device() returns the correct
device for each channel.
This also prepares for making the DMA engine provider data structures
private. DMA consumers should not access DMA engine internals directly.
Link: https://lore.kernel.org/20260917205016.1293317-1-Frank.Li@oss.nxp.com
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Assisted-by: LLM
Cc: Alexandre Bounine <alex.bou9@gmail.com>
Cc: Dan Carpenter <error27@gmail.com>
Cc: Kees Cook <kees@kernel.org>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/rapidio/devices/rio_mport_cdev.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/rapidio/devices/rio_mport_cdev.c b/drivers/rapidio/devices/rio_mport_cdev.c index 47ba34b4afb2..40d2953a9a7f 100644 --- a/drivers/rapidio/devices/rio_mport_cdev.c +++ b/drivers/rapidio/devices/rio_mport_cdev.c @@ -555,7 +555,7 @@ static void dma_req_free(struct kref *ref) refcount); struct mport_cdev_priv *priv = req->priv; - dma_unmap_sg(req->dmach->device->dev, + dma_unmap_sg(dmaengine_get_dma_device(req->dmach), req->sgt.sgl, req->sgt.nents, req->dir); sg_free_table(&req->sgt); if (req->page_list) { @@ -916,7 +916,7 @@ rio_dma_transfer(struct file *filp, u32 transfer_mode, xfer->offset, xfer->length); } - nents = dma_map_sg(chan->device->dev, + nents = dma_map_sg(dmaengine_get_dma_device(chan), req->sgt.sgl, req->sgt.nents, dir); if (nents == 0) { rmcd_error("Failed to map SG list"); |