Comment # 3 on bug 1228425 from Miroslav Franc

I believe this to be a kernel bug.

[    0.341483] [    T1] sysfs: cannot create duplicate filename
'/devices/iucv/hvc_iucv527465712'
[    0.341487] [    T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted
6.10.1-1.g178f0b6-default #1 openSUSE Tumbleweed (unreleased)
af3a669763d3674057710f333a872a5bb858d543
[    0.341492] [    T1] Hardware name: IBM 8561 LT1 400 (z/VM 7.3.0)
[    0.341493] [    T1] Call Trace:
[    0.341495] [    T1]  [<000003412021923a>] dump_stack_lvl+0x72/0x98
[    0.341502] [    T1]  [<000003411fbc2698>] sysfs_warn_dup+0x78/0x90
[    0.341505] [    T1]  [<000003411fbc280a>] sysfs_create_dir_ns+0xda/0xf0
[    0.341507] [    T1]  [<00000341201e538c>] kobject_add_internal+0xdc/0x340
[    0.341510] [    T1]  [<00000341201e5662>] kobject_add+0x72/0xc0
[    0.341512] [    T1]  [<000003411fede77c>] device_add+0xcc/0x7d0
[    0.341517] [    T1]  [<0000034120cc63a6>] hvc_iucv_init+0x336/0x468
[    0.341521] [    T1]  [<000003411f74c9cc>] do_one_initcall+0x3c/0x220
[    0.341523] [    T1]  [<0000034120c8ea26>] kernel_init_freeable+0x2de/0x340
[    0.341526] [    T1]  [<000003412021ab3e>] kernel_init+0x2e/0x180
[    0.341529] [    T1]  [<000003411f74f08c>] __ret_from_fork+0x3c/0x60
[    0.341531] [    T1]  [<000003412022b76a>] ret_from_fork+0xa/0x30
[    0.341535] [    T1] kobject: kobject_add_internal failed for
hvc_iucv527465712 with -EEXIST, don't try to register things with the same name
in the same directory.
[    0.341539] [    T1] hvc_iucv: Creating a new HVC terminal device failed
with error code=-17


Reverting
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=effb83572685eaa70d05a8dd6307ca574a11fcf3
and
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ccec5032291b108e694b55394cd035c9d840052a
makes it disappear.

I'm not yet sure what's the problem.  Those patches should not change the
kernel's behavior.