vf testpmd core dumped after executing "device_del dev1" in qemu

https://bugs.dpdk.org/show_bug.cgi?id=845

Bug ID: 845
Summary: vf testpmd core dumped after executing "device_del
dev1" in qemu
Product: DPDK
Version: 21.11
Hardware: x86
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: testpmd
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---

DPDK commit: b66412f24f17fcba5a248888bf4b3c1f5d6880de

OS: Ubuntu20.04.3
Compiler: gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0 Hardware platform: Intel(R) Xeon(R) CPU E5-2699 v3 @ 2.30GHz.

Repoduced steps:

# 1. bind nic to vfio-pci ./usertools/dpdk-devbind.py -b vfio-pci 0000:81:00.0

# 2. launch qemu
taskset -c 0-7 qemu-system-x86_64 -enable-kvm -pidfile
/tmp/.vm0.pid -m 10240 -cpu host -smp 8 -name vm0
-monitor unix:/tmp/vm0_monitor.sock,server,nowait -chardev
socket,path=/tmp/vm0_qga0.sock,server,nowait,id=vm0_qga0 -device
virtio-serial -device
virtserialport,chardev=vm0_qga0,name=org.qemu.guest_agent.0
-device e1000,netdev=nttsip1 -netdev
user,id=nttsip1,hostfwd=tcp:10.240.183.247:6000-:22 -monitor
stdio -drive file=/home/image/test_vfio.img -vnc
:5 -device vfio-pci,host=0000:81:00.0,id=dev1

# 3. ssh vm and execute command in vm
ssh 10.240.183.247 -p 6000
echo 0 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages echo 1024 > /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages modprobe vfio
modprobe vfio-pci
echo 1 > /sys/module/vfio/parameters/enable_unsafe_noiommu_mode usertools/dpdk-devbind.py --force --bind=vfio-pci 0000:00:05.0

# 4. vf launch testpmd x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 0,1,2,3,4,5,6,7 -n 1 -a
0000:00:05.0 --file-prefix=dpdk_10860_20211027111447 -- -i --hot-plug

# 5. execute "device_del dev1" in the qemu window
device_del dev1

# 6. check output in tespmd window

Output:
# EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.

The testpmd window hangs

Expected Result:
# Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
EAL: Cannot find device (0000:00:05.0) on bus (pci)

The tespmd window can be used normally.

Version the regression was introduced:

commit c2bd9367e18f5b00c1a3c5eb281a512ef52c5dfd
Author: Harman Kalra <[email protected]>
Date: Sat Oct 23 02:19:32 2021 +0530

lib: remove direct access to interrupt handle

Removing direct access to interrupt handle structure fields, rather use respective get set APIs for the same.
Making changes to all the libraries access the interrupt handle fields.

lib/bbdev/rte_bbdev.c | 4 ++--
lib/eal/linux/eal_dev.c | 57 +++++++++++++++++++++++++++++-------------------- lib/ethdev/rte_ethdev.c | 14 ++++++------

3 files changed, 43 insertions, 32 deletions

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