[PATCH] dma-mapping: treat dev->bus_dma_mask as a DMA limit

[Christoph Hellwig]

On Tue, Nov 19, 2019 at 05:17:03PM +0000, Robin Murphy wrote:
> TBH I can't see it being a massive problem even if the DMA patch, driver 
> and DTS patch went entirely separately via the respective DMA, PCI, and 
> arm-soc trees in the same cycle. Bisecting over a merge window is a big 
> enough pain in the bum as it is, and if the worst case is that someone 
> trying to do that on a Pi4 has a wonky PCI controller appear for a couple 
> of commits, they may as well just disable that driver for their bisection, 
> because it wasn't there at the start so can't possibly be the thing they're 
> looking for regressions in ;)

Agreed.

Nicolas, can you send a respin?  That way I can still queue it up
for 5.5.