Andrzej Pietrasiewicz 10209abe87
usb: dwc2: gadget: Add scatter-gather mode ...
This patch adds support for transferring requests, which are
non-contiguous in physical memory, i.e. the data buffer is described by
a scatter-list. This allows transferring large requests without relying
on error-prone contiguous buffer allocations. This way of allocating
requests is already implemented in functionfs and TCM USB functions and
automatically used if UDC driver advertises scatter-gather suppport.
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com >
[mszyprow: fixed null pointer issue, rewrote commit message]
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com >
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com >
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10209abe87