* Re: [Bug 213873] New: Hotplug ethernet cable to runtime suspended Realtek NIC doesn't raise PCIe PME IRQ on Intel ADL [not found] <bug-213873-41252@https.bugzilla.kernel.org/> @ 2021-07-27 15:55 ` Bjorn Helgaas 2021-07-29 14:50 ` Kai-Heng Feng 0 siblings, 1 reply; 2+ messages in thread From: Bjorn Helgaas @ 2021-07-27 15:55 UTC (permalink / raw) To: linux-pci; +Cc: Kai-Heng Feng, Rafael J. Wysocki, linux-pm On Tue, Jul 27, 2021 at 06:10:13AM +0000, bugzilla-daemon@bugzilla.kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=213873 > > Bug ID: 213873 > Summary: Hotplug ethernet cable to runtime suspended Realtek > NIC doesn't raise PCIe PME IRQ on Intel ADL > Product: Drivers > Version: 2.5 > Kernel Version: mainline > Hardware: All > OS: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: PCI > Assignee: drivers_pci@kernel-bugs.osdl.org > Reporter: kai.heng.feng@canonical.com > Regression: No > > Both PCIe bridge and Realtek NIC are runtime suspended. When ethernet cable is > plugged, PMEStatus and PMEPending are marked: > RootSta: PME ReqID 0200, PMEStatus+ PMEPending+ > > But the IRQ isn't raised: > $ cat /proc/interrupts | grep PME > 145: 0 0 0 0 0 0 > 0 0 0 0 0 0 VMD-MSI 126 PCIe > PME, aerdrv, pcie-dpc > > So the hotplug event isn't detected. > > -- From the lspci after cable hotplug (comment #3): 0000:00:1c.0 PCI bridge ... RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna- CRSVisible- RootSta: PME ReqID 0200, PMEStatus+ PMEPending+ So it looks like the root port is not enabled to generate a PME interrupt. pcie_pme_interrupt_enable() looks like it *could* enable that. From a quick look, my guess is that pme.c doesn't claim this root port because the platform says it doesn't support it: acpi PNP0A08:00: _OSC: platform does not support [PCIeHotplug SHPCHotplug PME] acpi PNP0A08:00: _OSC: OS now controls [AER PCIeCapability LTR] Does booting with "pcie_ports=native" make it work? That's not a very good solution, of course, because then both the firmware and Linux think they own this functionality. Is there a BIOS update that would fix this? Bjorn ^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [Bug 213873] New: Hotplug ethernet cable to runtime suspended Realtek NIC doesn't raise PCIe PME IRQ on Intel ADL 2021-07-27 15:55 ` [Bug 213873] New: Hotplug ethernet cable to runtime suspended Realtek NIC doesn't raise PCIe PME IRQ on Intel ADL Bjorn Helgaas @ 2021-07-29 14:50 ` Kai-Heng Feng 0 siblings, 0 replies; 2+ messages in thread From: Kai-Heng Feng @ 2021-07-29 14:50 UTC (permalink / raw) To: Bjorn Helgaas; +Cc: Linux PCI, Rafael J. Wysocki, Linux PM On Tue, Jul 27, 2021 at 11:55 PM Bjorn Helgaas <helgaas@kernel.org> wrote: > > On Tue, Jul 27, 2021 at 06:10:13AM +0000, bugzilla-daemon@bugzilla.kernel.org wrote: > > https://bugzilla.kernel.org/show_bug.cgi?id=213873 > > > > Bug ID: 213873 > > Summary: Hotplug ethernet cable to runtime suspended Realtek > > NIC doesn't raise PCIe PME IRQ on Intel ADL > > Product: Drivers > > Version: 2.5 > > Kernel Version: mainline > > Hardware: All > > OS: Linux > > Tree: Mainline > > Status: NEW > > Severity: normal > > Priority: P1 > > Component: PCI > > Assignee: drivers_pci@kernel-bugs.osdl.org > > Reporter: kai.heng.feng@canonical.com > > Regression: No > > > > Both PCIe bridge and Realtek NIC are runtime suspended. When ethernet cable is > > plugged, PMEStatus and PMEPending are marked: > > RootSta: PME ReqID 0200, PMEStatus+ PMEPending+ > > > > But the IRQ isn't raised: > > $ cat /proc/interrupts | grep PME > > 145: 0 0 0 0 0 0 > > 0 0 0 0 0 0 VMD-MSI 126 PCIe > > PME, aerdrv, pcie-dpc > > > > So the hotplug event isn't detected. > > > > -- > > From the lspci after cable hotplug (comment #3): > > 0000:00:1c.0 PCI bridge ... > RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna- CRSVisible- > RootSta: PME ReqID 0200, PMEStatus+ PMEPending+ > > So it looks like the root port is not enabled to generate a PME > interrupt. pcie_pme_interrupt_enable() looks like it *could* enable > that. From a quick look, my guess is that pme.c doesn't claim this > root port because the platform says it doesn't support it: > > acpi PNP0A08:00: _OSC: platform does not support [PCIeHotplug SHPCHotplug PME] > acpi PNP0A08:00: _OSC: OS now controls [AER PCIeCapability LTR] > > Does booting with "pcie_ports=native" make it work? That's not a very > good solution, of course, because then both the firmware and Linux > think they own this functionality. Yes, thanks for spotting this. > > Is there a BIOS update that would fix this? This platform is still under enablement so we'll get a BIOS fix. Kai-Heng > > Bjorn ^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2021-07-29 14:50 UTC | newest] Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- [not found] <bug-213873-41252@https.bugzilla.kernel.org/> 2021-07-27 15:55 ` [Bug 213873] New: Hotplug ethernet cable to runtime suspended Realtek NIC doesn't raise PCIe PME IRQ on Intel ADL Bjorn Helgaas 2021-07-29 14:50 ` Kai-Heng Feng
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.