Re: [PATCH 09/10] sh: don't allow non-coherent DMA for NOMMU

Christoph Hellwig
2020-08-28T04:24:26Z

On Thu, Aug 27, 2020 at 10:11:53PM -0400, Rich Felker wrote:
> > This change broke SD card support on J2 because MMC_SPI spuriously
> > depends on HAS_DMA. It looks like it can be fixed just by removing
> > that dependency from drivers/mmc/host/Kconfig.
>
> It can't. mmp_spi_probe fails with ENOMEM, probably due to trying to
> do some DMA setup thing that's not going to be needed if the
> underlying SPI device doesn't support/use DMA.

Adding the linux-mmc and linux-spi lists, as that seems pretty odd.