linux-kernel - Re: [PATCH net-next v2 5/6] net: bcmasp: Keep buffers through power management

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Date: Wed, 28 Feb 2024 09:53:46 -0800
From: Justin Chen <justin.chen@...adcom.com>
To: Simon Horman <horms@...nel.org>
Cc: netdev@...r.kernel.org, florian.fainelli@...adcom.com,
 davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
 pabeni@...hat.com, robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
 conor+dt@...nel.org, opendmb@...il.com,
 bcm-kernel-feedback-list@...adcom.com, andrew@...n.ch, hkallweit1@...il.com,
 linux@...linux.org.uk, rafal@...ecki.pl, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v2 5/6] net: bcmasp: Keep buffers through power
 management



On 2/28/24 1:45 AM, Simon Horman wrote:
> On Tue, Feb 27, 2024 at 10:54:53AM -0800, Justin Chen wrote:
>> There is no advantage of freeing and re-allocating buffers through
>> suspend and resume. This waste cycles and makes suspend/resume time
>> longer. We also open ourselves to failed allocations in systems with
>> heavy memory fragmentation.
>>
>> Signed-off-by: Justin Chen <justin.chen@...adcom.com>
>> Acked-by: Florian Fainelli <florian.fainelli@...adcom.com>
> 
> ...
> 
>> @@ -1118,6 +1083,10 @@ static int bcmasp_open(struct net_device *dev)
>>   
>>   	netif_dbg(intf, ifup, dev, "bcmasp open\n");
>>   
>> +	ret = bcmasp_alloc_buffers(intf);
>> +	if (ret)
>> +		return ret;
>> +
> 
> Hi Justin,
> 
> Do the resources allocated by bcmasp_alloc_buffers() need
> to be released if an error occurs in bcmasp_open() below this line?
> 

Yes good catch. Will send v3.

Thanks,
Justin

>>   	ret = clk_prepare_enable(intf->parent->clk);
>>   	if (ret)
>>   		return ret;
>> -- 
>> 2.34.1
>>
> 
> 

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