From mboxrd@z Thu Jan  1 00:00:00 1970
From: Russell King - ARM Linux <linux@arm.linux.org.uk>
Subject: Re: [PATCH 01/11] dma: imx-sdma: make channel0
	operations atomic
Date: Fri, 27 Apr 2012 14:10:10 +0100
Message-ID: <20120427131010.GN24211@n2100.arm.linux.org.uk>
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To: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Vinod Koul <vinod.koul@linux.intel.com>, "kernel@pengutronix.de" <kernel@pengutronix.de>, "broonie@opensource.wolfsonmicro.com" <broonie@opensource.wolfsonmicro.com>, "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>, "w.sang@pengutronix.de" <w.sang@pengutronix.de>, Richard Zhao <richard.zhao@freescale.com>, "linux-i2c@vger.kernel.org" <linux-i2c@vger.kernel.org>, "ben-linux@fluff.org" <ben-linux@fluff.org>, "dan.j.williams@intel.com" <dan.j.williams@intel.com>, "shawn.guo@linaro.org" <shawn.guo@linaro.org>, "lrg@ti.com" <lrg@ti.com>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>, Lothar =?iso-8859-1?Q?Wa=DFmann?= <LW@KARO-electronics.de>
List-Id: linux-i2c@vger.kernel.org

On Fri, Apr 27, 2012 at 06:31:13PM +0530, Laxman Dewangan wrote:
> On Friday 27 April 2012 05:03 PM, Russell King - ARM Linux wrote:
>> On Fri, Apr 27, 2012 at 07:26:56PM +0800, Richard Zhao wrote:
>>> Sure, I mean, can you doc in include/linux/dmaengine.h that
>>> dmaengine_prep_xxx may sleep?
>> Incorrect.  They may _not_ sleep.
>
> But I have seen that we are using the kzalloc in the dmaengine_prep_xxx  
> and kzalloc is sleeping call.

Not with GFP_ATOMIC it isn't.