> This doesn't work, try "echo 1 | sudo tee power" instead. This was not a permission issue, I already gave it read/write permission. admin@node-4:/sys/bus/pci/slots/14$ sudo echo 1 > power -bash: power: Permission denied admin@node-4:/sys/bus/pci/slots/14$ sudo chmod 0666 power admin@node-4:/sys/bus/pci/slots/14$ sudo echo 1 > power echo: write error: Operation not permitted admin@node-4:/sys/bus/pci/slots/14$ > This is from a "Link up" situation (DLActive+), it would be more > interesting to get lspci output of the port in a "No link" situation. Unfortunately, I did not collect that output before system reboot. On Tue, 12 Dec 2023 at 16:29, Lukas Wunner <lukas@xxxxxxxxx> wrote: > > On Tue, Dec 12, 2023 at 04:04:41PM +0530, Ashutosh Sharma wrote: > > Removed one NVMe drive (pci address 0000:83:00.0), it got unbound > > successfully from "vfio-pci" driver but saw below error in the syslog. > > > > can't change power state from D0 to D3hot (config space inaccessible) > > This is normal, the drive's config space is inaccessible after removal. > > > > Then after 2:30 min approx, re-inserted the same drive to the same PCI > > slot. But the drive was not detected. > > > > Dec 11 23:54:39 node-4 kernel: [183672.630191] pcieport 0000:80:03.2: > > pciehp: Slot(14): Attention button pressed > > Dec 11 23:54:39 node-4 kernel: [183672.630195] pcieport 0000:80:03.2: > > pciehp: Slot(14) Powering on due to button press > > Dec 11 23:54:44 node-4 kernel: [183677.671931] pcieport 0000:80:03.2: > > pciehp: Slot(14): Card present > > Dec 11 23:54:46 node-4 kernel: [183679.783922] pcieport 0000:80:03.2: > > pciehp: Slot(14): No link > > The link doesn't come up, so the kernel gives up on the slot. > > I don't know what the reason is, could be a hardware issue or > protocol incompatibility. This doesn't look like a kernel issue. > > > > | +-03.0 Advanced Micro Devices, Inc. [AMD] > > Starship/Matisse PCIe Dummy Host Bridge > > | +-03.1-[82]----00.0 Samsung Electronics Co Ltd NVMe SSD > > Controller PM9A1/PM9A3/980PRO > > | +-03.2-[83]-- > > Adding Mario, Smita, Yazen from AMD to cc, maybe they have an idea > what the issue is or how to get diagnostics on this Epyc platform. > > Start of thread: > https://lore.kernel.org/linux-pci/CADOvten7jG7KjW6W1MRd7i8_E18L0xCCaCzmZOY_vvgJhdfOSw@xxxxxxxxxxxxxx/ > > > > admin@node-4:/sys/bus/pci/slots/14$ sudo echo 1 > power > > echo: write error: Operation not permitted > > This doesn't work, try "echo 1 | sudo tee power" instead. > > > > lspci output of the pci port: > > 80:03.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] > > Starship/Matisse GPP Bridge (prog-if 00 [Normal decode]) > [...] > > LnkSta: Speed 16GT/s (ok), Width x4 (ok) > > TrErr- Train- SlotClk+ DLActive+ BWMgmt+ ABWMgmt- > > This is from a "Link up" situation (DLActive+), it would be more > interesting to get lspci output of the port in a "No link" situation. > > Thanks, > > Lukas
