Re: [spi-devel-general] [patch 05/14] mfd: PCAP2 driver

[David Brownell]

On Saturday 22 November 2008, Daniel Ribeiro wrote:
> Can you be more descriptive on "address the DMA"? Im not familiar on
> what is the issue here.

You may not pass stack based buffers -- as you're now doing -- for
the spi_transfer buffers.  Documentation/DMA-mapping.txt is very
clear that such buffers are not DMA-safe, and the SPI kerneldoc is
just as clear that spi_transfer.{tx,rx}_buf memory must be DMA-safe.

- Dave

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