[PATCH v4] staging: gdm724x: Fix DMA from stack
David Laight
David.Laight at ACULAB.COM
Thu Feb 11 13:28:41 UTC 2021
> 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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