Messages in this thread | | | Date | Wed, 23 Jan 2013 14:07:57 +0900 | Subject | Re: [PATCH v2] ARM: PL011: Add support for Rx DMA buffer polling | From | Chanho Min <> |
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On Tue, Jan 22, 2013 at 10:18 PM, Linus Walleij <linus.walleij@linaro.org> wrote: >> - If poll timer is activated, We use consistent DMA mappings to avoid from >> the frequent cache operation of the timer function. sg->coherency is used >> to check if buffer is coherent. > > Hm. We can begin like this but maybe we should later patch it to > make this the default unless it has performance impacts on our > systems. Good, I really hope to make this the default. We expect it has no impact to system even if no polling use.
> Maybe this is a good opportunity to add some kerneldoc above > this struct so as to help platform implementers. It will invariably > be reused by Device Tree binding authors later on... Agree, but, frankly I need help about what I didn't modify. So We will leave this work for the next submit.
Thanks Chanho
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