linux-kernel - Re: [PATCH 14/18] dmaengine/amba-pl08x: Choose peripheral bus as master bus

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Date:	Sun, 31 Jul 2011 02:36:20 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Viresh Kumar <viresh.kumar@...com>
Cc:	pratyush.anand@...com, rajeev-dlh.kumar@...com,
	linux@....linux.org.uk, bhupesh.sharma@...com,
	shiraz.hashim@...com, vinod.koul@...el.com,
	linux-kernel@...r.kernel.org, vipin.kumar@...com,
	armando.visconti@...com, amit.virdi@...com,
	vipulkumar.samar@...com, viresh.linux@...il.com,
	deepak.sikri@...com, dan.j.williams@...el.com,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 14/18] dmaengine/amba-pl08x: Choose peripheral bus as
 master bus

2011/7/29 Viresh Kumar <viresh.kumar@...com>:

> When we have DMA transfers between peripheral and memory, then we shouldn't
> reduce width of peripheral at all, as that may be a strict requirement. But we
> can always reduce width of memory access, with some compromise in performance.
> Thus, we must select peripheral as master and not memory.
>
> Also this rearranges code to make it shorter.
>
> Signed-off-by: Viresh Kumar <viresh.kumar@...com>

Looks correct to me!
Acked-by: Linus Walleij <linus.walleij@...aro.org>

Thanks,
Linus Walleij
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