[PATCHv6 3/8] dma-mapping: add dma_{map,unmap}_resource

[Niklas Söderlund]

Hi Konrad,

Thanks for your feedback.

On 2016-05-17 10:54:45 -0400, Konrad Rzeszutek Wilk wrote:
> >  
> > -In some circumstances dma_map_single() and dma_map_page() will fail to create
> > -a mapping. A driver can check for these errors by testing the returned
> > -DMA address with dma_mapping_error(). A non-zero return value means the mapping
> > -could not be created and the driver should take appropriate action (e.g.
> > -reduce current DMA mapping usage or delay and try again later).
> > +In some circumstances dma_map_single(), dma_map_page() and dma_map_resource()
> > +will fail to create a mapping. A driver can check for these errors by testing
> > +the returned DMA address with dma_mapping_error(). A non-zero return value
> > +means the mapping could not be created and the driver should take appropriate
> > +action (e.g. reduce current DMA mapping usage or delay and try again later).
> 
> This looks like it belongs to another patch?

No it is correct (at least intended to be in this patch). All it really 
do is inject dma_map_resource() (which is added in this patch) as one of 
the calls which return dma_addr_t should be checked for error using 
dma_mapping_error().  But yes the change effect all lines in the 
paragraph due to line wrapping.

Hum or maybe I'm misunderstanding your question.

-- 
Regards,
Niklas Söderlund