On Fri, Aug 03, 2018 at 06:59:20PM +0300, Andy Shevchenko wrote: > >>> I'm pretty sure this was created in an order to avoid bad looking (and > >>> in some cases frightening) "NULL device *" part. > > JFYI: git log --no-merges --grep 'NULL device \*' I think those commits actually argue in favour of Tony's patch to remove the special casing. Is it really useful to create dma pools with a NULL device?