netdev - Re: [PATCH net-next 2/5] net: wwan: t7xx: Infrastructure for early port configuration

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Date:   Wed, 17 Aug 2022 21:53:39 +0530
From:   "Kumar, M Chetan" <m.chetan.kumar@...ux.intel.com>
To:     Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        m.chetan.kumar@...el.com
Cc:     Netdev <netdev@...r.kernel.org>, kuba@...nel.org,
        davem@...emloft.net, johannes@...solutions.net,
        ryazanov.s.a@...il.com, loic.poulain@...aro.org,
        krishna.c.sudi@...el.com, linuxwwan@...el.com,
        Haijun Liu <haijun.liu@...iatek.com>,
        Madhusmita Sahu <madhusmita.sahu@...el.com>,
        Ricardo Martinez <ricardo.martinez@...ux.intel.com>,
        Devegowda Chandrashekar <chandrashekar.devegowda@...el.com>
Subject: Re: [PATCH net-next 2/5] net: wwan: t7xx: Infrastructure for early
 port configuration

On 8/17/2022 5:40 PM, Ilpo Järvinen wrote:
> On Tue, 16 Aug 2022, m.chetan.kumar@...el.com wrote:
> 
>> From: Haijun Liu <haijun.liu@...iatek.com>
>>

<skip>

>> @@ -372,7 +435,8 @@ static int t7xx_port_proxy_recv_skb(struct cldma_queue *queue, struct sk_buff *s
>>   
>>   	seq_num = t7xx_port_next_rx_seq_num(port, ccci_h);
>>   	port_conf = port->port_conf;
>> -	skb_pull(skb, sizeof(*ccci_h));
>> +	if (!port->port_conf->is_early_port)
>> +		skb_pull(skb, sizeof(*ccci_h));
> 
> This seems to be the only user for is_early_port, wouldn't be more obvious
> to store the header size instead?

Early port doesn't carry header.
If we change it to header size, skb_pull() operators on zero length. OR 
may need another such flag to bypass it.


-- 
Chetan