linux-kernel - Re: [PATCH net-next 2/5] r8152: replace array with linking list for rx information

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Message-ID: <20190806144003.457b244e@cakuba.netronome.com>
Date:   Tue, 6 Aug 2019 14:40:03 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     Hayes Wang <hayeswang@...ltek.com>
Cc:     <netdev@...r.kernel.org>, <nic_swsd@...ltek.com>,
        <linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>
Subject: Re: [PATCH net-next 2/5] r8152: replace array with linking list for
 rx information

On Tue, 6 Aug 2019 12:53:42 -0700, Jakub Kicinski wrote:
> > @@ -744,6 +745,8 @@ struct r8152 {
> >  		void (*autosuspend_en)(struct r8152 *tp, bool enable);
> >  	} rtl_ops;
> >  
> > +	atomic_t rx_count;  
> 
> I wonder what the advantage of rx_count being atomic is, perhpas it
> could be protected by the same lock as the list head?

Okay, I see you're using it to test the queue length without the lock in
a later patch.