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| author | Frank Li <Frank.Li@nxp.com> | 2026-09-09 12:22:31 -0400 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2026-09-15 21:54:16 +0530 |
| commit | 6ad1b49cc30dc9bc7c06dd44241e61fe6f82c0b8 (patch) | |
| tree | 5f65641c2d29da450fb6addcf4420690550eb2d2 /tools/perf/scripts/python | |
| parent | 3b97a3ec420542591c10db8600cf481f1038a011 (diff) | |
| download | linux-next-6ad1b49cc30dc9bc7c06dd44241e61fe6f82c0b8.tar.gz linux-next-6ad1b49cc30dc9bc7c06dd44241e61fe6f82c0b8.zip | |
dmaengine: add union chan_dev for dma_chan::dev for clarity
The current dma_chan structure contains both "device" and "dev". So
chan->device->dev refers to the DMA engine device.
chan->dev->device refers to the per-channel device instance.
Their similar naming makes the distinction unclear and increases reader
confusion.
Add union dma_chan::chan_dev to make its purpose explicit and clearly
identify it as the per-channel device. After all user switch to chan_dev,
union and dma_chan::dev will be removed.
Update the kernel-doc accordingly. Besides its sysfs usage, the per-channel
device is also used by some DMA engine drivers for IOMMU mapping and
therefore deserves a more accurate description.
No functional change intended.
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260909-dma-chan_dev-rename-v4-4-d8fb6892a70f@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions