Re: [Intel-wired-lan] suspend/resume broken of igc driver broken on 6.12

[Stephen Hemminger <stephen@networkplumber.org>]

On Thu, 30 Jan 2025 21:17:30 +0200
"Lifshits, Vitaly" <vitaly.lifshits@intel.com> wrote:

> On 1/30/2025 7:11 PM, Stephen Hemminger wrote:
> > I am using:
> > 
> > 5a:00.0 Ethernet controller: Intel Corporation Ethernet Controller I226-LM (rev 04)
> > 	Subsystem: Intel Corporation Device 0000
> > 	Flags: bus master, fast devsel, latency 0, IRQ 19, IOMMU group 20
> > 	Memory at 6c500000 (32-bit, non-prefetchable) [size=1M]
> > 	Memory at 6c600000 (32-bit, non-prefetchable) [size=16K]
> > 	Capabilities: [40] Power Management version 3
> > 	Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
> > 	Capabilities: [70] MSI-X: Enable+ Count=5 Masked-
> > 	Capabilities: [a0] Express Endpoint, IntMsgNum 0
> > 	Capabilities: [100] Advanced Error Reporting
> > 	Capabilities: [140] Device Serial Number 58-47-ca-ff-ff-7a-98-3d
> > 	Capabilities: [1c0] Latency Tolerance Reporting
> > 	Capabilities: [1f0] Precision Time Measurement
> > 	Capabilities: [1e0] L1 PM Substates
> > 	Kernel driver in use: igc
> > 	Kernel modules: igc
> > 
> > 
> > Using both Debian testing and my own kernel built from 6.12, the igc
> > driver appears broken after resume.  
> 
>  From which system state are you resuming?
> 
> > 
> > After resuming the device is down and no address present.
> > Attempts to set link up manually fail.  
> 
> Did you get any errors in the dmesg log?
> What is the firmware version on your device (you can get it by running 
> ethtool -i)?
> 
> > If I do rmmod/modprobe of igc it comes back.
> > 
> > Doing a bit of bisectting but it is slow going.  
> 
> Meanwhile, we'll also try to reproduce this issue in our lab.  Could you 
> share more details about your system so we can create a similar setup?

Given that error reported is -ENODEV, might be a generic netdev problem not
just for igc device.