netdev - Re: [PATCH net-next v11 4/7] net: tn40xx: add basic Tx handling

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Date: Wed, 19 Jun 2024 12:44:22 +0900 (JST)
From: FUJITA Tomonori <fujita.tomonori@...il.com>
To: kuba@...nel.org
Cc: fujita.tomonori@...il.com, netdev@...r.kernel.org, andrew@...n.ch,
 horms@...nel.org, jiri@...nulli.us, pabeni@...hat.com,
 linux@...linux.org.uk, hfdevel@....net, naveenm@...vell.com,
 jdamato@...tly.com
Subject: Re: [PATCH net-next v11 4/7] net: tn40xx: add basic Tx handling

On Tue, 18 Jun 2024 18:50:00 -0700
Jakub Kicinski <kuba@...nel.org> wrote:

> On Tue, 18 Jun 2024 14:16:05 +0900 FUJITA Tomonori wrote:
>> + * As our benchmarks shows, it adds 1.5 Gbit/sec to NIS's throughput.
> 
> nit: NIC's

Oops, fixed.

>> +static int tn40_start_xmit(struct sk_buff *skb, struct net_device *ndev)
> 
> return type should be netdev_tx_t ?

Indeed, fixed.

>> +	netif_trans_update(ndev);
> 
> I don't think you need to call this, core sets the trans time
> all by itself

Got it, removed.

>> +static void tn40_link_changed(struct tn40_priv *priv)
>> +{
>> +	u32 link = tn40_read_reg(priv,
>> +				 TN40_REG_MAC_LNK_STAT) & TN40_MAC_LINK_STAT;
>> +
>> +	netdev_dbg(priv->ndev, "link changed %u\n", link);
> 
> shouldn't this call netif_carrier_on / off?

According to phylink doc, a driver shouldn't call them?

>> +		mdelay(100);
> 
> there are 3 more mdelays in the driver, all seem like candidates for
> being msleep

Removed all the mdelay calls.

Thanks!