linux-kernel - RE: [PATCH net-next v23 04/13] rtase: Implement the interrupt routine and rtase

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Message-ID: <55abfcf00da1494fbc98fc0389ab7c3a@realtek.com>
Date: Fri, 12 Jul 2024 08:31:41 +0000
From: Justin Lai <justinlai0215@...ltek.com>
To: Jakub Kicinski <kuba@...nel.org>
CC: "davem@...emloft.net" <davem@...emloft.net>,
        "edumazet@...gle.com"
	<edumazet@...gle.com>,
        "pabeni@...hat.com" <pabeni@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "andrew@...n.ch"
	<andrew@...n.ch>,
        "jiri@...nulli.us" <jiri@...nulli.us>,
        "horms@...nel.org"
	<horms@...nel.org>,
        "rkannoth@...vell.com" <rkannoth@...vell.com>,
        "jdamato@...tly.com" <jdamato@...tly.com>,
        Ping-Ke Shih <pkshih@...ltek.com>, Larry Chiu <larry.chiu@...ltek.com>
Subject: RE: [PATCH net-next v23 04/13] rtase: Implement the interrupt routine and rtase_poll

> On Wed, 10 Jul 2024 11:32:25 +0800 Justin Lai wrote:
> > +#ifdef CONFIG_NET_POLL_CONTROLLER
> > +/* Polling 'interrupt' - used by things like netconsole to send skbs
> > + * without having to re-enable interrupts. It's not called while
> > + * the interrupt routine is executing.
> > + */
> > +static void rtase_netpoll(struct net_device *dev) {
> > +     const struct rtase_private *tp = netdev_priv(dev);
> > +     const struct pci_dev *pdev = tp->pdev;
> > +
> > +     disable_irq(pdev->irq);
> > +     rtase_interrupt(pdev->irq, dev);
> 
> Why do you need to implement a separate netpoll handler?
> netpoll is optional, if driver doesn't implement it core will just core your NAPI
> handlers with a budget of 0 (to only clean up Tx, see NAPI documentation).
> 
> disable_irq() sleeps, you most definitely can't call it here.
> --
> pw-bot: cr

Hi Jakub,

After confirming, I think there is no need to implement the netpoll handler,
so I will remove it.