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	id 1wHBoz-0005hr-4T; Mon, 27 Apr 2026 04:35:41 +0200
Date: Mon, 27 Apr 2026 04:35:41 +0200
From: Andrew Lunn <andrew@lunn.ch>
To: =?utf-8?B?67CV66qF7ZuI?= <mhun512@gmail.com>
Cc: Hartley Sweeten <hsweeten@visionengravers.com>,
	Andrew Lunn <andrew+netdev@lunn.ch>,
	"David S . Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Ijae Kim <ae878000@gmail.com>, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH DRAFT] net: cirrus: ep93xx: fix probe error unwind
Message-ID: <4201a9ff-c137-4e08-85f8-32aaa6aa3836@lunn.ch>
References: <20260426141010.19049-1-pakmyeonghun@bagmyeonghun-ui-MacBookPro.local>
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In-Reply-To: <20260426141010.19049-1-pakmyeonghun@bagmyeonghun-ui-MacBookPro.local>

On Sun, Apr 26, 2026 at 11:10:06PM +0900, 박명훈 wrote:
> From: Myeonghun Pak <mhun512@gmail.com>
> 
> ep93xx_eth_probe() uses ep93xx_eth_remove() as common error unwind
> after setting driver data. When register_netdev() fails, this calls
> unregister_netdev() for a net_device that was never registered. The
> net core treats that as a driver bug and emits WARN_ON(1).

How did you trigger the failure of register_netdev()?

    Andrew