netdev - Re: [PATCH net-next v10 2/4] ethtool: provide customized dim profile management

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Date: Mon, 29 Apr 2024 20:13:00 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Heng Qi <hengqi@...ux.alibaba.com>
Cc: netdev@...r.kernel.org, virtualization@...ts.linux.dev, "David S . 
 Miller" <davem@...emloft.net>, Paolo Abeni <pabeni@...hat.com>, Eric 
 Dumazet <edumazet@...gle.com>, Jason Wang <jasowang@...hat.com>, "Michael S
  . Tsirkin" <mst@...hat.com>, Brett Creeley <bcreeley@....com>, Ratheesh 
 Kannoth <rkannoth@...vell.com>, Alexander Lobakin
 <aleksander.lobakin@...el.com>, Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, Tal
  Gilboa <talgi@...dia.com>, Jonathan Corbet <corbet@....net>,
 linux-doc@...r.kernel.org, Maxime Chevallier
 <maxime.chevallier@...tlin.com>, Jiri Pirko <jiri@...nulli.us>, Paul 
 Greenwalt <paul.greenwalt@...el.com>, Ahmed Zaki <ahmed.zaki@...el.com>,
 Vladimir Oltean <vladimir.oltean@....com>, Kory Maincent
 <kory.maincent@...tlin.com>, Andrew Lunn <andrew@...n.ch>, "justinstitt @ 
 google . com" <justinstitt@...gle.com>
Subject: Re: [PATCH net-next v10 2/4] ethtool: provide customized dim
 profile management

On Tue, 30 Apr 2024 09:59:39 +0800 Heng Qi wrote:
> + if (moder[ETHTOOL_A_IRQ_MODERATION_USEC]) {
> + 	if (irq_moder->coal_flags & DIM_COALESCE_USEC)
> + 		new_profile[i].usec =
> + 			nla_get_u32(moder[ETHTOOL_A_IRQ_MODERATION_USEC]);
> + 	else
> + 		return -EOPNOTSUPP;
> + }

Almost, the extack should still be there on error:

+ if (moder[ETHTOOL_A_IRQ_MODERATION_USEC])
+ 	if (irq_moder->coal_flags & DIM_COALESCE_USEC) {
+ 		new_profile[i].usec =
+ 			nla_get_u32(moder[ETHTOOL_A_IRQ_MODERATION_USEC]);
+ 	} else {
+		NL_SET_BAD_ATTR(extack, moder[ETHTOOL_A_IRQ_MODERATION_USEC]);
+ 		return -EOPNOTSUPP;
+ 	}