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From: tresonic <tresonic@mail.de>
To: netdev@vger.kernel.org
Cc: regressions@lists.linux.dev, rmk+kernel@armlinux.org.uk, kuba@kernel.org
Subject: [REGRESSION][BISECTED] stmmac: suspend hangs since 1b9707e6f1a9 ("net: stmmac: enable RPS and RBU interrupts")
Date: Thu, 16 Jul 2026 22:10:25 +0200	[thread overview]
Message-ID: <7941d239-e5f5-43b5-ae0f-20398221e027@mail.de> (raw)

Hello,
Please bear with me, this is my first time writing to a mailing list...

Since commit 1b9707e6f1a9, suspend (systemctl suspend) causes a full system freeze on my laptop. Fans and keyboard backlight stay powered; the machine is completely unresponsive and requires a hard power-off (holding the power button) to recover. I could not get any kernel output from the hang.

- Reproduces on current master
- git revert 1b9707e6f1a9... on top of master fixes the issue
- Workaround: sudo ip link set eno1 down before suspend avoids the hang entirely; with the interface down, suspend/resume works normally even on the bad commit

Hardware:

64:00.0 Ethernet controller: Motorcomm Microelectronics. YT6801 Gigabit Ethernet Controller (rev 01)
Kernel driver in use: dwmac-motorcomm

[    5.672548] YT8531S Gigabit Ethernet stmmac-6400:00: attached PHY driver (mii_bus:phy_addr=stmmac-6400:00, irq=POLL)
[    5.890940] dwmac-motorcomm 0000:64:00.0 eno1: PHY [stmmac-6400:00] driver [YT8531S Gigabit Ethernet] (irq=POLL)

Thank you,
tresonic

             reply	other threads:[~2026-07-16 20:20 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-16 20:10 tresonic [this message]
2026-07-16 21:47 ` [REGRESSION][BISECTED] stmmac: suspend hangs since 1b9707e6f1a9 ("net: stmmac: enable RPS and RBU interrupts") Andrew Lunn

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