netdev - Re: [PATCH net-next 2/3] r8169: use new macro netif_subqueue_maybe_stop in rtl8169_start

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Message-ID: <20230414185329.6e8ada34@kernel.org>
Date:   Fri, 14 Apr 2023 18:53:29 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Heiner Kallweit <hkallweit1@...il.com>
Cc:     David Miller <davem@...emloft.net>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Realtek linux nic maintainers <nic_swsd@...ltek.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next 2/3] r8169: use new macro
 netif_subqueue_maybe_stop in rtl8169_start_xmit

On Thu, 13 Apr 2023 21:15:37 +0200 Heiner Kallweit wrote:
> +	stop_queue = netif_subqueue_maybe_stop(dev, 0, rtl_tx_slots_avail(tp),
> +					       R8169_TX_STOP_THRS,
> +					       R8169_TX_START_THRS);
> +	if (door_bell || stop_queue < 0)

Macro returns 0 if it did the action. So I'd have expected <= or !
Maybe better to invert the return value at the call site..

	stopped = !netif_subqueue_maybe_stop(...
	if (door_bell || stopped)
		..