On Tue, Aug 27, 2019 at 06:03:14PM +0900, Masahiro Yamada wrote: > Yes, this makes my driver working again > when CONFIG_DMA_CMA=y. > > > If I apply the following, my driver gets back working > irrespective of CONFIG_DMA_CMA. That sounds a lot like the device simply isn't 64-bit DMA capable, and previously always got CMA allocations under the limit it actually supported. I suggest that you submit this quirk to the mmc maintainers.
