linux-kernel - Re: [PATCH] staging: comedi: das1800: prefer kmalloc

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Date:	Tue, 20 Jan 2015 11:04:04 +0000
From:	Ian Abbott <abbotti@....co.uk>
To:	Chase Southwood <chase.southwood@...il.com>,
	gregkh@...uxfoundation.org
CC:	hsweeten@...ionengravers.com, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: comedi: das1800: prefer kmalloc_array over kmalloc
 with multiply

On 20/01/15 02:42, Chase Southwood wrote:
> Checkpatch doesn't like kmalloc with multiply very much:
> drivers/staging/comedi/drivers/das1800.c:1377: WARNING: Prefer kmalloc_array over kmalloc with multiply
>
> So this patch swaps that use out for kmalloc_array instead.
>
> Signed-off-by: Chase Southwood <chase.southwood@...il.com>
> ---
>   drivers/staging/comedi/drivers/das1800.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/staging/comedi/drivers/das1800.c b/drivers/staging/comedi/drivers/das1800.c
> index 381ae94..13ed31c 100644
> --- a/drivers/staging/comedi/drivers/das1800.c
> +++ b/drivers/staging/comedi/drivers/das1800.c
> @@ -1374,7 +1374,7 @@ static int das1800_attach(struct comedi_device *dev,
>   	if (dev->irq & it->options[2])
>   		das1800_init_dma(dev, it);
>
> -	devpriv->fifo_buf = kmalloc(FIFO_SIZE * sizeof(uint16_t), GFP_KERNEL);
> +	devpriv->fifo_buf = kmalloc_array(FIFO_SIZE, sizeof(uint16_t), GFP_KERNEL);
>   	if (!devpriv->fifo_buf)
>   		return -ENOMEM;
>
>

Reviewed-by: Ian Abbott <abbotti@....co.uk>

-- 
-=( Ian Abbott @ MEV Ltd.    E-mail: <abbotti@....co.uk> )=-
-=(                          Web: http://www.mev.co.uk/  )=-
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