On Thu, May 09, 2024 at 02:43:52PM +0100, Steven Price wrote: > The specific drivers are "rockchip-drm" and "rk_gmac-dwmac". Is it a > requirement that all drivers engaging in DMA should call dma_set_mask() > - and therefore this has uncovered a bug in those drivers. Or is the > assumption that all drivers call dma_set_mask() faulty? That was the assumption behind the code, but the assumption is wrong. Alex is working on a fix.