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Date: Fri, 25 Nov 2022 22:43:44 +0100 From: Andrew Lunn <andrew@...n.ch> To: Xiaolei Wang <xiaolei.wang@...driver.com> Cc: hkallweit1@...il.com, linux@...linux.org.uk, davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [v2][PATCH 1/1] net: phy: Add link between phy dev and mac dev On Fri, Nov 25, 2022 at 12:12:06PM +0800, Xiaolei Wang wrote: > If the external phy used by current mac interface is > managed by another mac interface, it means that this > network port cannot work independently, especially > when the system suspend and resume, the following > trace may appear, so we should create a device link > between phy dev and mac dev. > > WARNING: CPU: 0 PID: 24 at drivers/net/phy/phy.c:983 phy_error+0x20/0x68 > Modules linked in: > CPU: 0 PID: 24 Comm: kworker/0:2 Not tainted 6.1.0-rc3-00011-g5aaef24b5c6d-dirty #34 > Hardware name: Freescale i.MX6 SoloX (Device Tree) > Workqueue: events_power_efficient phy_state_machine > unwind_backtrace from show_stack+0x10/0x14 > show_stack from dump_stack_lvl+0x68/0x90 > dump_stack_lvl from __warn+0xb4/0x24c > __warn from warn_slowpath_fmt+0x5c/0xd8 > warn_slowpath_fmt from phy_error+0x20/0x68 > phy_error from phy_state_machine+0x22c/0x23c > phy_state_machine from process_one_work+0x288/0x744 > process_one_work from worker_thread+0x3c/0x500 > worker_thread from kthread+0xf0/0x114 > kthread from ret_from_fork+0x14/0x28 > Exception stack(0xf0951fb0 to 0xf0951ff8) > > Signed-off-by: Xiaolei Wang <xiaolei.wang@...driver.com> This needs Florians review, since for v1 he thinks it will cause regressions. Andrew
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