On Thu, Jun 27, 2024 at 10:43:24AM +0100, Jon Hunter wrote: > We have just noticed that since Linux v6.9 was released, that if we > build the kernel with 64kB MMU pages, then we see the following WARNING > and probe failure ... The old code upgraded the limits to the PAGE_SIZE for this case after issunig a warning. Your driver probably incorrectly advertised the lower max_segment_size. Try setting it to 64k. I would have sent you a patch for that, but I can't see what mmc host driver you are using.