On 28.03.22 15:33, Thorsten Leemhuis wrote: > Hi, this is your Linux kernel regression tracker. > > Rafael, I noticed a regression report in bugzilla.kernel.org that afaics > nobody acted upon since it was reported about a week ago, that's why I > decided to forward it to the lists, maintainers, and the author of the > culprit. To quote from > https://bugzilla.kernel.org/show_bug.cgi?id=215715 : > >> Stefan Gottwald 2022-03-21 13:31:43 UTC >> >> Created attachment 300589 [details] >> dmesg output from error case >> >> We got a Elo AIO i2 device which most current BIOS where WiFi was working with Kernel 5.12.x but stopped working since Kernel 5.13.19 and newer (5.17.0-rc5). >> >> The kernel error message is: >> >> [ 3.419766] iwlwifi 0000:01:00.0: can't change power state from D3cold to D0 (config space inaccessible) >> [ 3.419781] iwlwifi 0000:01:00.0: can't change power state from D3cold to D0 (config space inaccessible) >> [ 3.419975] iwlwifi 0000:01:00.0: HW_REV=0xFFFFFFFF, PCI issues? >> [ 3.420911] iwlwifi: probe of 0000:01:00.0 failed with error -5 >> >> The issue can be solved by adding the iwlwifi driver to the initramfs so it is loaded much earlier and seems to work. >> >> To narrow down the issue I did an git bisect between v5.13.18 and v5.13.19 mainline kernel version which got me to following commit which if reverted fix the issue on this device. >> >> Reverting commit d0660d8ab123ea471064f0828f290bec9593e16b : PCI: Use pci_update_current_state() in pci_enable_device_flags() > > FWIW, that afaics is d0660d8ab123 ("PCI: Use pci_update_current_state() > in pci_enable_device_flags()") in mainline. Sorry, I made a (obvious) cut-n-paste error there: the stable commit mentioned by the reporter is 14858dcc3b35 ("PCI: Use pci_update_current_state() in pci_enable_device_flags()") in mainline. #regzbot introduced: 14858dcc3b35 >> resolve the issue also in the newer kernels. Seems like the function platform_pci_get_power_state is always returning PCI_D3cold on this device also if this is not true. > > Could somebody take a look into this? Or was this discussed somewhere > else already? Or even fixed? > > Anyway, to get this tracked: > > #regzbot introduced: d0660d8ab123ea471064f0828f290bec9593e16b > #regzbot from: Stefan Gottwald <gottwald@xxxxxxxx> > #regzbot title: pci/iwlwifi: wifi is not working due to PCI power state > change issues > #regzbot link: https://bugzilla.kernel.org/show_bug.cgi?id=215715 > > Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat) > > P.S.: As the Linux kernel's regression tracker I'm getting a lot of > reports on my table. I can only look briefly into most of them and lack > knowledge about most of the areas they concern. I thus unfortunately > will sometimes get things wrong or miss something important. I hope > that's not the case here; if you think it is, don't hesitate to tell me > in a public reply, it's in everyone's interest to set the public record > straight. >
