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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 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?