linux-kernel - Re: [PATCH 2/2] DMA: PL330: Check the pointer returned by kzalloc

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Date:	Tue, 18 Sep 2012 09:06:14 +0530
From:	Vinod Koul <vinod.koul@...ux.intel.com>
To:	Sachin Kamat <sachin.kamat@...aro.org>
Cc:	linux-kernel@...r.kernel.org, jassisinghbrar@...il.com,
	patches@...aro.org
Subject: Re: [PATCH 2/2] DMA: PL330: Check the pointer returned by kzalloc

On Mon, 2012-09-17 at 15:20 +0530, Sachin Kamat wrote:
> kzalloc could return NULL. Hence add a check to avoid
> NULL pointer dereference.
> 
> Signed-off-by: Sachin Kamat <sachin.kamat@...aro.org>
> ---
>  drivers/dma/pl330.c |    5 +++++
>  1 files changed, 5 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
> index 018a445..5d3bbcd 100644
> --- a/drivers/dma/pl330.c
> +++ b/drivers/dma/pl330.c
> @@ -2930,6 +2930,11 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
>  		num_chan = max_t(int, pi->pcfg.num_peri, pi->pcfg.num_chan);
>  
>  	pdmac->peripherals = kzalloc(num_chan * sizeof(*pch), GFP_KERNEL);
> +	if (!pdmac->peripherals) {
> +		ret = -ENOMEM;
> +		dev_err(&adev->dev, "unable to allocate pdmac->peripherals\n");
> +		goto probe_err5;
> +	}
>  
>  	for (i = 0; i < num_chan; i++) {
>  		pch = &pdmac->peripherals[i];

Thanks applied both to fixes. 
I have cc'ed stable as well

-- 
~Vinod

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