From: "Troy Mitchell" <troy.mitchell@linux.spacemit.com>
To: "Ali Tariq" <alitariq45892@gmail.com>
Cc: "Vadim Fedorenko" <vadim.fedorenko@linux.dev>,
<netdev@vger.kernel.org>, "Andrew Lunn" <andrew+netdev@lunn.ch>,
"David S. Miller" <davem@davemloft.net>,
"Eric Dumazet" <edumazet@kernel.org>,
"Jakub Kicinski" <kuba@kernel.org>,
"Paolo Abeni" <pabeni@redhat.com>, "Yixun Lan" <dlan@kernel.org>,
"Troy Mitchell" <troy.mitchell@linux.spacemit.com>,
"Vivian Wang" <wangruikang@iscas.ac.cn>,
"Chukun Pan" <amadeus@jmu.edu.cn>,
"Siddharth Vadapalli" <s-vadapalli@ti.com>,
"Tomas Hlavacek" <tmshlvck@gmail.com>,
"Muhammad Bilal" <meatuni001@gmail.com>,
"Maxime Chevallier" <maxime.chevallier@bootlin.com>,
<linux-riscv@lists.infradead.org>, <spacemit@lists.linux.dev>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH net] net: spacemit: Hold RTNL lock in emac_resume() and emac_suspend()
Date: Fri, 06 Nov 2026 09:43:13 +0000 [thread overview]
Message-ID: <DMO13SWAGZAN.NYISGLGI7Y5A@linux.spacemit.com> (raw)
In-Reply-To: <20261105123441.2524171-1-alitariq45892@gmail.com>
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On Thu, 5 Nov 2026 17:34:37 +0500, Ali Tariq wrote:
> @@ -2056,7 +2059,9 @@ static int emac_suspend(struct device *dev)
> return 0;
> }
>
> + rtnl_lock();
> emac_stop(ndev);
> + rtnl_unlock();
>
> clk_disable_unprepare(priv->bus_clk);
> netif_device_detach(ndev);
This can deadlock. emac_stop() -> emac_down() calls
cancel_work_sync(&priv->tx_timeout_task) with RTNL now held, while
emac_tx_timeout_task() starts with rtnl_lock().
--
Troy Mitchell
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next prev parent reply other threads:[~2026-11-06 9:45 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-05 12:34 Ali Tariq
2026-11-05 13:40 ` Breno Leitao
2026-11-05 22:28 ` Vadim Fedorenko
2026-11-06 9:41 ` Troy Mitchell
2026-11-06 11:54 ` Breno Leitao
2026-11-06 14:28 ` Troy Mitchell
2026-11-06 9:43 ` Troy Mitchell [this message]
2026-11-06 10:44 ` Ali Tariq
2026-11-06 14:26 ` Troy Mitchell
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