https://bugzilla.kernel.org/show_bug.cgi?id=202055 --- Comment #11 from Alex (coffmaker@xxxxxxxxx) --- Rebind to vfio-pci and reset device. root@localhost /home/alex # echo 0000:06:00.0 | tee /sys/bus/pci/devices/0000\:06\:00.0/driver/unbind 0000:06:00.0 root@localhost /home/alex # echo 8086 f1a6 | tee /sys/bus/pci/drivers/vfio-pci/new_id 8086 f1a6 root@localhost /home/alex # echo 0000:06:00.0 | tee /sys/bus/pci/devices/0000\:06\:00.0/driver/unbind 0000:06:00.0 root@localhost /home/alex # echo 8086 f1a6 | tee /sys/bus/pci/drivers/nvme/new_id 8086 f1a6 root@localhost /home/alex # echo 1 | teee /sys/bus/pci/devices/0000:06:00.0/reset 1 At this point got Count=22 as expected with nvme in use. 06:00.0 Non-Volatile memory controller [0108]: Intel Corporation SSD Pro 7600p/760p/E 6100p Series [8086:f1a6] (rev 03) (prog-if 02 [NVM Express]) ... Capabilities: [b0] MSI-X: Enable+ Count=22 Masked- Vector table: BAR=0 offset=00002000 PBA: BAR=0 offset=00002100 ... Kernel driver in use: nvme root@localhost /home/alex # lspci -tvv | grep SSD +-01.1-[06]----00.0 Intel Corporation SSD Pro 7600p/760p/E 6100p Series root@localhost /home/alex # setpci -s 00:01.1 BRIDGE_CONTROL 0010 root@localhost /home/alex # setpci -s 00:01.1 BRIDGE_CONTROL=40:40 && sleep 0.1 && setpci -s 00:01.1 BRIDGE_CONTROL=0:40 && sleep 1 This time lspci reports Count=16. Capabilities: [b0] MSI-X: Enable- Count=16 Masked- Vector table: BAR=0 offset=00002000 PBA: BAR=0 offset=00002100 Rebooted. Rebound to vfio-pci. root@localhost /home/alex # echo 0000:06:00.0 | tee /sys/bus/pci/devices/0000\:06\:00.0/driver/unbind 0000:06:00.0 root@localhost /home/alex # echo 8086 f1a6 | tee /sys/bus/pci/drivers/vfio-pci/new_id 8086 f1a6 At this point before bus reset lspci reports Count=16 as expected root@localhost /home/alex # setpci -s 00:01.1 BRIDGE_CONTROL=40:40 && sleep 0.1 && setpci -s 00:01.1 BRIDGE_CONTROL=0:40 && sleep 1 Now lspci still reports Count=16 with vfio-pci in use. 06:00.0 Non-Volatile memory controller [0108]: Intel Corporation SSD Pro 7600p/760p/E 6100p Series [8086:f1a6] (rev 03) (prog-if 02 [NVM Express]) ... Capabilities: [b0] MSI-X: Enable- Count=16 Masked- Vector table: BAR=0 offset=00002000 PBA: BAR=0 offset=00002100 ... Kernel driver in use: vfio-pci -- You are receiving this mail because: You are watching the assignee of the bug.
