Re: [alsa-devel] [PATCH v3 8/9] spi: rockchip: modify DMA max burst to 1

On Tue, Sep 01, 2015 at 05:58:44PM +0800, Shawn Lin wrote:

Generic dma controller on Rockchips' platform cannot support DMAFLUSHP instruction which make dma to flush the req of non-aligned or non-multiple of what we need. That will cause an unrecoverable dma bus error. The saftest way is to set dma max burst to 1.

If this is a quirk of the DMA controller why is it being fixed with a property specific to the SPI controller? Can't the DMA controller just override the burst size?

+#define ROCKCHIP_SPI_BORKEN_BURST_LEN (1<<0) /* broken burst len*/

This is misspelt.