linux-kernel - Re: [PATCH v2][RESENT] dma: add R-Car Audio DMAC peri peri driver

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Message-ID: <1394416022.30791.7.camel@joe-AO722>
Date:	Sun, 09 Mar 2014 18:47:02 -0700
From:	Joe Perches <joe@...ches.com>
To:	Kuninori Morimoto <kuninori.morimoto.gx@...il.com>
Cc:	Vinod Koul <vinod.koul@...el.com>,
	Morimoto <kuninori.morimoto.gx@...esas.com>,
	Linux-SH <linux-sh@...r.kernel.org>,
	linux-kernel@...r.kernel.org,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	dmaengine@...r.kernel.org
Subject: Re: [PATCH v2][RESENT] dma: add R-Car Audio DMAC peri peri driver

On Sun, 2014-03-09 at 18:34 -0700, Kuninori Morimoto wrote:
> Add support Audio DMAC peri peri driver
> for Renesas R-Car Gen2 SoC, using 'shdma-base'
> DMA driver framework.

Trivial notes:

> diff --git a/drivers/dma/sh/rcar-audmapp.c b/drivers/dma/sh/rcar-audmapp.c
[]
> +static int audmapp_chan_probe(struct platform_device *pdev,
> +			      struct audmapp_device *audev, int id)
> +{
[]
> +	auchan = devm_kzalloc(dev, sizeof(struct audmapp_chan), GFP_KERNEL);
> +	if (!auchan) {
> +		dev_err(dev, "No free memory for allocating dma channels!\n");

Unnecessary OOM as the alloc has a generic OOM
and a dump_stack()

[]
> +static int audmapp_probe(struct platform_device *pdev)
> +{
[]
> +	audev = devm_kzalloc(&pdev->dev, sizeof(struct audmapp_device),
> +			     GFP_KERNEL);
> +	if (!audev) {
> +		dev_err(&pdev->dev, "Not enough memory\n");

here too


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