linux-kernel - dmaengine: Can we schedule new transfer from dma callback routine??

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Date:	Mon, 11 Apr 2011 13:25:04 +0530
From:	viresh kumar <viresh.kumar@...com>
To:	"Koul, Vinod" <vinod.koul@...el.com>,
	Dan Williams <dan.j.williams@...el.com>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Amit GOEL <amit.goel@...com>,
	Shiraz HASHIM <shiraz.hashim@...com>,
	Armando VISCONTI <armando.visconti@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linus.walleij@...ricsson.com" <linus.walleij@...ricsson.com>
Subject: dmaengine: Can we schedule new transfer from dma callback routine??


Hello,

In dw_dmac.c driver, dwc_descriptor_complete() routine, following is
mentioned before calling callback:

	/*
	 * The API requires that no submissions are done from a
	 * callback, so we don't need to drop the lock here
	 */
	if (callback)
		callback(param);

Does this hold true for dmaengine??

-- 
viresh
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