On Mon, Aug 26, 2019 at 11:05:00AM +0900, Masahiro Yamada wrote: > This is included in v5.3-rc6 > so I tested it. So there is no allocation failure, but you get I/O errors later? Does the device use a device-private CMA area? Does it work with Linux 5.2 if CONFIG_DMA_CMA is disabled?