Re: [PATCH] dma-direct: don't truncate dma_required_mask to bus addressing capabilities

[Christoph Hellwig]

On Mon, Aug 05, 2019 at 05:51:53PM +0200, Lucas Stach wrote:
> The dma required_mask needs to reflect the actual addressing capabilities
> needed to handle the whole system RAM. When truncated down to the bus
> addressing capabilities dma_addressing_limited() will incorrectly signal
> no limitations for devices which are restricted by the bus_dma_mask.
> 
> Fixes: b4ebe6063204 (dma-direct: implement complete bus_dma_mask handling)
> Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>

Yeah, this looks sensible.  Atish, can you check if this helps on the
HiFive board as well?