RE: [PATCH v4] staging: gdm724x: Fix DMA from stack

[David Laight]

> Stack allocated buffers cannot be used for DMA
> on all architectures so allocate hci_packet buffer
> using kmalloc.

I wonder if the usb stack ought/could support a short bounce
buffer within the memory is already has to allocate?

For hci and lengths less than 8 the immediate data can be
placed directly in the ring structure replacing the data
pointer itself.

	David

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