Dear Madam/Sir：
I am new to DPDK and have some problems with 'No probed ethernet devices'
and 'Unable to parse device '0000:0b:00.0''
The environment is ：
cpu: Intel(R) Xeon(R) Gold 6254 CPU @ 3.10GHz
system: VM EXSI7.02u + centos7.7
linux kernel： 4.19.237
DPDK version: dpdk-21.11
network card： mellanox connextX-5 MCX512A
drive: MLNX_OFED_LINUX-5.5-1.0.3.2-rhel7.7-x86_64
network config：both The pass-through and SR_IOV
When I run my own DPDK program which was upgraded from DPDK version
19.08 to 21.11，eal init reported error ：'No probed ethernet devices’ ，or
'Unable to parse device '0000:0b:00.0'' When I set up ‘-a 0000:0b:00.0’
But when I run app/dpdk-testpmd， there is no problem whether I set
'-a 0b:00.0' or not。
I compared the two programs，There is no difference before
rte_eal_init() in main(). The parameters passed to DPDK are also consistent.
I query to that driver is mlx5_core.
My user program uses Makefile with：
PKGCONF = pkg-config
CFLAGS += -O2 $(shell
$(PKGCONF) --cflags --static libdpdk)
LDFLAGS += $(shell $(PKGCONF)
--libs --static libdpdk)
How should this problem be solved？
Is there any additional configuration for the DPDK user program before
running the main() function? Or maybe my compilation method doesn't meet the
requirements for the MLX5 driver？
More info：
./dpdk-devbind.py -s
Network devices using kernel driver
===================================
0000:04:00.0 '82574L Gigabit Network Connection 10d3' if=ens161 drv=e1000e
unused= *Active*
0000:0b:00.0 'MT27800 Family [ConnectX-5] 1017' if=ens192 drv=mlx5_core unused=
*Active*
0000:0c:00.0 'MT27800 Family [ConnectX-5 Virtual Function] 1018' if=ens193
drv=mlx5_core unused=
0000:13:00.0 'MT27800 Family [ConnectX-5 Virtual Function] 1018' if=ens224
drv=mlx5_core unused= *Active*
0000:1b:00.0 'MT27800 Family [ConnectX-5 Virtual Function] 1018' if=ens256
drv=mlx5_core unused= *Active*
No 'Baseband' devices detected
==============================
No 'Crypto' devices detected
============================
No 'DMA' devices detected
=========================
No 'Eventdev' devices detected
==============================
No 'Mempool' devices detected
=============================
No 'Compress' devices detected
==============================
No 'Misc (rawdev)' devices detected
===================================
No 'Regex' devices detected
