acassis commented on issue #16412:
URL: https://github.com/apache/nuttx/issues/16412#issuecomment-2892140996
@snikeguo the preflight normally is used to double check that the buffer is
correctly aligned, that the memory source is DMA capable, etc. It also could be
used to enable some MCU specific feature required before executing the DMA
transfer.
I think when capabilities were included into NuttX the right comments missed:
```
# MMC/SD-related platform capabilities
config ARCH_HAVE_SDIO
bool
default n
config ARCH_HAVE_SDIOWAIT_WRCOMPLETE
bool
default n
config ARCH_HAVE_SDIO_PREFLIGHT
bool
default n
``
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