netdev - Re: NETDEV WATCHDOG + transmit queue timed out

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Message-ID: <40f61816-8e0e-40ac-87ef-b7058778d056@lunn.ch>
Date: Wed, 30 Jul 2025 18:36:22 +0200
From: Andrew Lunn <andrew@...n.ch>
To: _ <j9@...ip.com>
Cc: netdev@...r.kernel.org
Subject: Re: NETDEV WATCHDOG + transmit queue timed out

On Tue, Jul 29, 2025 at 07:18:32PM -0400, _ wrote:
> Hi
> 
> When I try to use network interface end0 on kernel version 6.14 for Rockchip
> RK3588 SoC, I get this in dmesg:
> 
> "rk_gmac-dwmac fe1c0000.ethernet end0: NETDEV WATCHDOG: CPU: 1: transmit
> queue 1 timed out 5408 ms"
> 
> dmesg:
> rk_gmac-dwmac fe1c0000.ethernet end0: Link is Up - 10Mbps/Half - flow
> control off
> rk_gmac-dwmac fe1c0000.ethernet end0: NETDEV WATCHDOG: CPU: 2: transmit
> queue 1 timed out 5388 ms
> rk_gmac-dwmac fe1c0000.ethernet end0: Reset adapter.
> rk_gmac-dwmac fe1c0000.ethernet end0: Timeout accessing MAC_VLAN_Tag_Filter
> rk_gmac-dwmac fe1c0000.ethernet end0: failed to kill vid 0081/0
> rk_gmac-dwmac fe1c0000.ethernet end0: Register MEM_TYPE_PAGE_POOL RxQ-0
> rk_gmac-dwmac fe1c0000.ethernet end0: Register MEM_TYPE_PAGE_POOL RxQ-1
> rk_gmac-dwmac fe1c0000.ethernet end0: PHY [stmmac-0:01] driver [RTL8211F
> Gigabit Ethernet] (irq=POLL)
> dwmac4: Master AXI performs any burst length
> rk_gmac-dwmac fe1c0000.ethernet end0: No Safety Features support found
> rk_gmac-dwmac fe1c0000.ethernet end0: IEEE 1588-2008 Advanced Timestamp
> supported
> rk_gmac-dwmac fe1c0000.ethernet end0: registered PTP clock
> rk_gmac-dwmac fe1c0000.ethernet end0: configuring for phy/rgmii link mode
> 8021q: adding VLAN 0 to HW filter on device end0
> rk_gmac-dwmac fe1c0000.ethernet end0: Link is Up - 10Mbps/Half - flow
> control off

10Mbps/Half is valid, but it is a bit unusual this decade, when most
networks are now 1G full duplex. What is your link partner, and do you
expect this slow a link?

	Andrew