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

From: Vitaly Wool
Date: Wed Dec 14 2005 - 14:34:29 EST


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
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/