[spi-devel-general] Re: [PATCH/RFC] SPI: add DMAUNSAFE analog to David Brownell's core

[Vitaly W. <vw...@ru...>]

David Brownell wrote:

>On Wednesday 14 December 2005 9:53 am, Vitaly Wool wrote:
>
>  
>
>>	 Sound cards behind the SPI bus will suffer a lot more 
>>since it's their path to use wXrY functions (lotsa small transfers) 
>>rather than WLAN's.
>>    
>>
>
>No, "stupid drivers will suffer"; nothing new.  Just observe
>how the ads7846 touchscreen driver does small async transfers.
>  
>
Two more cents: ads7846 has a bunch of code just related to the need to 
do something from the interrupt context. Without this constraint, I 
don't see why w8r8 can not be used in most cases (of course, with the 
changes I propose).

Vitaly