Re: [PATCH 4/4] mmc: sdhci: Add DMA memory boundary workaround

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On Mon, Dec 02, 2019 at 10:41:04PM +0800, Jun Nie wrote:
> DMA memory cannot cross specific boundary for some SDHCI controller,
> such as DesignWare SDHCI controller. Add DMA memory boundary dt
> property and workaround the limitation.

If you use blk_queue_segment_boundary to tell the block layer the
segment boundary restrictions it won't ever send you segments
that don't fit.  With just the workaround in this patch you'll run into
max_segments accounting issues, don't you?



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