Hi matan:

I have enabled mlx5 hotplug based on the failsafe pmd:

"--vdev", "net_failsafe0,mac=04:e8:92:7d:dd:e4,dev(08:00.0)", "-b", "08:00.0"

08:00.0 is mlx5 NIC.

The app started successfully.

However, I had some problems verifying the hotplug function. Here are the steps:

echo 1 > /sys/bus/pci/devices/0000:08:00.0/remove

echo 1 > /sys/bus/pci/rescan

The app had the following error:

EAL: PCI device 0000:08:00.0 on NUMA socket 0

EAL:   probe driver: 15b3:1017 net_mlx5

net_mlx5: port 2 cannot get MAC address, is mlx5_en loaded? (errno: Function not implemented)

net_mlx5: probe of PCI device 0000:08:00.0 aborted after encountering an error: No such device

EAL: Driver cannot attach the device (08:00.0)

EAL: Failed to attach device on primary process

net_failsafe: sub_device 0 probe failed (No such device)

Look at the code it is through the ioctl function to obtain the MAC address.

I wonder if there are other configurations that have not been done, causing this problem

Thanks!