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Subject: Re: [Intel-wired-lan] suspend/resume broken of igc driver broken on 6.12 X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" On 2/6/2025 6:13 AM, Stephen Hemminger wrote: > On Wed, 5 Feb 2025 12:36:31 +0200 > "Lifshits, Vitaly" wrote: > >> On 1/31/2025 3:21 AM, Stephen Hemminger wrote: >>> On Thu, 30 Jan 2025 21:17:30 +0200 >>> "Lifshits, Vitaly" 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. >>> >> >> We weren't able to reproduce this issue on our systems, even though we >> tried several suspend-resume cycles on different kernels and different >> systems. >> >> However, a few days ago we received a comment in a BZ about an issue >> similar to yours. In there adding a short delay in igc_resume function >> https://bugzilla.kernel.org/show_bug.cgi?id=219143 >> https://bugzilla.kernel.org/show_bug.cgi?id=219143#c123 >> >> >> >> Can you try to see if it fixes your issue as well? > > I tried the proposed delay and it had no impact. > Any idea of other things to instrument? > Has the adapter worked with a different kernel? Can you try to reproduce the issue over kernel 6.9? Is the LAN cable connected to the igc adapter? Does it maintain link during suspend? Also, I saw that on your board you have three more adapters, I assume that enp2s0f0np0 and enp2s0f0np1 are i40e adapters. Does this issue also happen to enp87s0?