[Intel-wired-lan] [REGRESSION] Deadlock since commit 6faee3d4ee8b ("igb: Add lock to avoid data race")

[Paul Menzel]

[Adding regressions at lists.linux.dev]

#regzbot ^introduced: 6faee3d4ee8b

Am 07.03.23 um 10:54 schrieb Corinna Vinschen:
> Hi,
> 
> 
> After patch 6faee3d4ee8b ("igb: Add lock to avoid data race"), we see
> a deadlock scenario when trying to unload the igb module.
> 
> The reproducer is pretty simple:
> 
>    # echo 2 > /sys/class/net/ens5f2/device/sriov_numvfs
>    # modprobe -r igb
> 
> The hang is quite thorough, I assume it's suffering a deadlock between
> the rtnl_lock and the spinlock introduced by 6faee3d4ee8b.
> 
> Any chance you could have a look?
> 
> 
> Thanks,
> Corinna