netdev - Re: [net-next 3/4] stmmac: verify the dma

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Date:	Thu, 19 Apr 2012 08:29:55 +0200
From:	Giuseppe CAVALLARO <peppe.cavallaro@...com>
To:	Viresh KUMAR <viresh.kumar@...com>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	spear-devel <spear-devel@...t.st.com>
Subject: Re: [net-next 3/4] stmmac: verify the dma_cfg platform fields

On 4/19/2012 8:05 AM, Viresh KUMAR wrote:
> On 4/19/2012 11:18 AM, Giuseppe CAVALLARO wrote:
>> Recently the dma parameters that can be passed from the platform
>> have been moved from the plat_stmmacenet_data to the stmmac_dma_cfg.
>>
>> In case of this new structure is not well allocated the driver can
>> fails. This is an example how this field is managed in ST platforms
>>
>> static struct stmmac_dma_cfg gmac_dma_setting = {
>>         .pbl = 32,
>> };
>>
>> static struct plat_stmmacenet_data stih415_ethernet_platform_data[] = {
>> 	{
>> 		.dma_cfg = &gmac_dma_setting,
>> 		.has_gmac = 1,
>> [snip]
>>
>> This patch so verifies that the dma_cfg passed from the platform.
>> In case of it is NULL there is no reason that the driver has to fail
>> and some default values can be passed. These are ok for all the
>> Synopsys chips and could impact on performances, only.
>>
>> Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@...com>
>> cc: Viresh Kumar <viresh.kumar@...com>
> 
> I really can't review it, as i am not stmmac expert. But, i am sure
> the problem i highlighted will be resolved by this patch.
> 
> Another thing, as SPEAr is using stmmac, can you always cc spear-devel@...t.st.com
> for all stmmac patches.

Yes! I have forgotten to add spear guys ;-)

Thanks for your feedbak

Peppe

> 

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