On 12/13/18 12:44 PM, Geert Uytterhoeven wrote: > Hi Greg, Jiri, > > When submitting a DMA request fails, the sh-sci driver is supposed to > fall back to PIO. However, this never really worked due to various > reasons (sh-sci driver issues and dmaengine framework limitations). Is it possible to test this under qemu-system-sh4? (Does that emulate the DMA controller?) Rob