linux-kernel - Re: [PATCH -next 26/26] sound: Use dma_zalloc

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Date:	Mon, 16 Jun 2014 11:40:22 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Joe Perches <joe@...ches.com>
Cc:	linux-kernel@...r.kernel.org,
	Johannes Berg <johannes@...solutions.net>,
	Jaroslav Kysela <perex@...ex.cz>,
	linuxppc-dev@...ts.ozlabs.org, alsa-devel@...a-project.org
Subject: Re: [PATCH -next 26/26] sound: Use dma_zalloc_coherent

At Sun, 15 Jun 2014 13:37:55 -0700,
Joe Perches wrote:
> 
> Use the zeroing function instead of dma_alloc_coherent & memset(,0,)
> 
> Signed-off-by: Joe Perches <joe@...ches.com>

Applied, thanks.


Takashi

> ---
>  sound/aoa/soundbus/i2sbus/core.c | 12 ++++--------
>  sound/sparc/dbri.c               |  6 ++----
>  2 files changed, 6 insertions(+), 12 deletions(-)
> 
> diff --git a/sound/aoa/soundbus/i2sbus/core.c b/sound/aoa/soundbus/i2sbus/core.c
> index 4678360..a80d5ea 100644
> --- a/sound/aoa/soundbus/i2sbus/core.c
> +++ b/sound/aoa/soundbus/i2sbus/core.c
> @@ -47,15 +47,11 @@ static int alloc_dbdma_descriptor_ring(struct i2sbus_dev *i2sdev,
>  	/* We use the PCI APIs for now until the generic one gets fixed
>  	 * enough or until we get some macio-specific versions
>  	 */
> -	r->space = dma_alloc_coherent(
> -			&macio_get_pci_dev(i2sdev->macio)->dev,
> -			r->size,
> -			&r->bus_addr,
> -			GFP_KERNEL);
> +	r->space = dma_zalloc_coherent(&macio_get_pci_dev(i2sdev->macio)->dev,
> +				       r->size, &r->bus_addr, GFP_KERNEL);
> +	if (!r->space)
> +		return -ENOMEM;
>  
> -	if (!r->space) return -ENOMEM;
> -
> -	memset(r->space, 0, r->size);
>  	r->cmds = (void*)DBDMA_ALIGN(r->space);
>  	r->bus_cmd_start = r->bus_addr +
>  			   (dma_addr_t)((char*)r->cmds - (char*)r->space);
> diff --git a/sound/sparc/dbri.c b/sound/sparc/dbri.c
> index be1b1aa..b2c3d0d 100644
> --- a/sound/sparc/dbri.c
> +++ b/sound/sparc/dbri.c
> @@ -2534,12 +2534,10 @@ static int snd_dbri_create(struct snd_card *card,
>  	dbri->op = op;
>  	dbri->irq = irq;
>  
> -	dbri->dma = dma_alloc_coherent(&op->dev,
> -				       sizeof(struct dbri_dma),
> -				       &dbri->dma_dvma, GFP_ATOMIC);
> +	dbri->dma = dma_zalloc_coherent(&op->dev, sizeof(struct dbri_dma),
> +					&dbri->dma_dvma, GFP_ATOMIC);
>  	if (!dbri->dma)
>  		return -ENOMEM;
> -	memset((void *)dbri->dma, 0, sizeof(struct dbri_dma));
>  
>  	dprintk(D_GEN, "DMA Cmd Block 0x%p (0x%08x)\n",
>  		dbri->dma, dbri->dma_dvma);
> -- 
> 1.8.1.2.459.gbcd45b4.dirty
> 
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