linux-kernel - Re: [PATCH v2 14/15] net: rnpgbe: Add base rx function

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Message-ID: <92D9F4A7FDB27183+20250723064938.GF169181@nic-Precision-5820-Tower>
Date: Wed, 23 Jul 2025 14:49:38 +0800
From: Yibo Dong <dong100@...se.com>
To: Simon Horman <horms@...nel.org>
Cc: andrew+netdev@...n.ch, davem@...emloft.net, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com, corbet@....net,
	gur.stavi@...wei.com, maddy@...ux.ibm.com, mpe@...erman.id.au,
	danishanwar@...com, lee@...ger.us, gongfan1@...wei.com,
	lorenzo@...nel.org, geert+renesas@...der.be,
	Parthiban.Veerasooran@...rochip.com, lukas.bulwahn@...hat.com,
	alexanderduyck@...com, richardcochran@...il.com,
	netdev@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 14/15] net: rnpgbe: Add base rx function

On Tue, Jul 22, 2025 at 03:14:26PM +0100, Simon Horman wrote:
> On Mon, Jul 21, 2025 at 07:32:37PM +0800, Dong Yibo wrote:
> > Initialize rx clean function.
> > 
> > Signed-off-by: Dong Yibo <dong100@...se.com>
> 
> ...
> 
> > diff --git a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_lib.c b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_lib.c
> 
> ...
> 
> > @@ -299,12 +707,27 @@ static int rnpgbe_poll(struct napi_struct *napi, int budget)
> >  	struct mucse_q_vector *q_vector =
> >  		container_of(napi, struct mucse_q_vector, napi);
> >  	struct mucse *mucse = q_vector->mucse;
> > +	int per_ring_budget, work_done = 0;
> >  	bool clean_complete = true;
> >  	struct mucse_ring *ring;
> > -	int work_done = 0;
> > +	int cleaned_total = 0;
> 
> cleaned_total is set but otherwise unused in this function.
> 
> Flagged by Clang 20.1.8 builds with KCFLAGS=-Wunused-but-set-variable.
> 

Got it, I can get this warning with KCFLAGS=-Wunused-but-set-variable
locally, I'll fix it.

> >  
> >  	mucse_for_each_ring(ring, q_vector->tx)
> >  		clean_complete = rnpgbe_clean_tx_irq(q_vector, ring, budget);
> > +	if (q_vector->rx.count > 1)
> > +		per_ring_budget = max(budget / q_vector->rx.count, 1);
> > +	else
> > +		per_ring_budget = budget;
> > +
> > +	mucse_for_each_ring(ring, q_vector->rx) {
> > +		int cleaned = 0;
> > +
> > +		cleaned = rnpgbe_clean_rx_irq(q_vector, ring, per_ring_budget);
> > +		work_done += cleaned;
> > +		cleaned_total += cleaned;
> > +		if (cleaned >= per_ring_budget)
> > +			clean_complete = false;
> > +	}
> >  
> >  	if (!netif_running(mucse->netdev))
> >  		clean_complete = true;
> 
> ...
> 
> > @@ -871,6 +1323,8 @@ static int rnpgbe_setup_rx_resources(struct mucse_ring *rx_ring,
> >  	memset(rx_ring->desc, 0, rx_ring->size);
> >  	rx_ring->next_to_clean = 0;
> >  	rx_ring->next_to_use = 0;
> > +	if (mucse_alloc_page_pool(rx_ring)
> 
> There is a trailing ')' missing from the line above.
> 

Yes, compile error here. I'll fix it.

> > +		goto err;
> >  
> >  	return 0;
> >  err:
> 
> ...
> 

Thanks for your feedback.