Public bug reported:
[Impact]
We'll see this call trace while plugged tbt device
Sep 24 13:24:22 ubuntu-202504-36599 kernel: sysfs: cannot create duplicate
filename '/devices/platform/USBC000:00/typec/port0/port0.0/partner'
Sep 24 13:24:22 ubuntu-202504-36599 kernel: CPU: 1 UID: 0 PID: 132 Comm:
kworker/u64:1 Tainted: G O 6.14.0-1012-oem #12-Ubuntu
Sep 24 13:24:22 ubuntu-202504-36599 kernel: Tainted: [O]=OOT_MODULE
Sep 24 13:24:22 ubuntu-202504-36599 kernel: Hardware name: Dell Inc. /, BIOS
x.x.x xx/xx/2025
Sep 24 13:24:22 ubuntu-202504-36599 kernel: Workqueue: USBC000:00-con1
ucsi_poll_worker [typec_ucsi]
Sep 24 13:24:22 ubuntu-202504-36599 kernel: Call Trace:
Sep 24 13:24:22 ubuntu-202504-36599 kernel: <TASK>
Sep 24 13:24:22 ubuntu-202504-36599 kernel: dump_stack_lvl+0x76/0xa0
Sep 24 13:24:22 ubuntu-202504-36599 kernel: dump_stack+0x10/0x20
Sep 24 13:24:22 ubuntu-202504-36599 kernel: sysfs_warn_dup+0x8a/0xb0
Sep 24 13:24:22 ubuntu-202504-36599 kernel: sysfs_do_create_link_sd+0xf1/0x100
Sep 24 13:24:22 ubuntu-202504-36599 kernel: sysfs_create_link+0x21/0x50
Sep 24 13:24:22 ubuntu-202504-36599 kernel: typec_probe+0x7e/0x100 [typec]
Sep 24 13:24:22 ubuntu-202504-36599 kernel: ? driver_sysfs_add+0x66/0xd0
Sep 24 13:24:22 ubuntu-202504-36599 kernel: really_probe+0xee/0x3c0
Sep 24 13:24:22 ubuntu-202504-36599 kernel: __driver_probe_device+0x8c/0x180
Sep 24 13:24:22 ubuntu-202504-36599 kernel: driver_probe_device+0x24/0xd0
Sep 24 13:24:22 ubuntu-202504-36599 kernel: __device_attach_driver+0xcd/0x170
Sep 24 13:24:22 ubuntu-202504-36599 kernel: ?
_pfx__device_attach_driver+0x10/0x10
Sep 24 13:24:22 ubuntu-202504-36599 kernel: bus_for_each_drv+0x94/0xf0
Sep 24 13:24:22 ubuntu-202504-36599 kernel: __device_attach+0xb6/0x1d0
Sep 24 13:24:22 ubuntu-202504-36599 kernel: device_initial_probe+0x13/0x20
Sep 24 13:24:22 ubuntu-202504-36599 kernel: bus_probe_device+0x9f/0xb0
Sep 24 13:24:22 ubuntu-202504-36599 kernel: device_add+0x513/0x710
Sep 24 13:24:22 ubuntu-202504-36599 kernel: device_register+0x1a/0x30
Sep 24 13:24:22 ubuntu-202504-36599 kernel: typec_register_altmode+0x253/0x3a0
[typec]
Sep 24 13:24:22 ubuntu-202504-36599 kernel:
typec_partner_register_altmode+0xe/0x20 [typec]
Sep 24 13:24:22 ubuntu-202504-36599 kernel:
ucsi_register_altmode.constprop.0+0x30e/0x390 [typec_ucsi]
Sep 24 13:24:22 ubuntu-202504-36599 kernel: ucsi_register_altmodes+0x162/0x250
[typec_ucsi]
Sep 24 13:24:22 ubuntu-202504-36599 kernel: ucsi_check_altmodes+0x19/0xb0
[typec_ucsi]
Sep 24 13:24:22 ubuntu-202504-36599 kernel: ucsi_poll_worker+0x3d/0xf0
[typec_ucsi]
Sep 24 13:24:22 ubuntu-202504-36599 kernel: process_one_work+0x178/0x3d0
Sep 24 13:24:22 ubuntu-202504-36599 kernel: worker_thread+0x2de/0x410
Sep 24 13:24:22 ubuntu-202504-36599 kernel: ? __pfx_worker_thread+0x10/0x10
Sep 24 13:24:22 ubuntu-202504-36599 kernel: kthread+0xfb/0x230
Sep 24 13:24:22 ubuntu-202504-36599 kernel: ? __pfx_kthread+0x10/0x10
Sep 24 13:24:22 ubuntu-202504-36599 kernel: ret_from_fork+0x44/0x70
Sep 24 13:24:22 ubuntu-202504-36599 kernel: ? __pfx_kthread+0x10/0x10
Sep 24 13:24:22 ubuntu-202504-36599 kernel: ret_from_fork_asm+0x1a/0x30
Sep 24 13:24:22 ubuntu-202504-36599 kernel: </TASK>
Sep 24 13:24:22 ubuntu-202504-36599 kernel: typec-thunderbolt port0-partner.1:
failed to create symlinks
Sep 24 13:24:22 ubuntu-202504-36599 kernel: typec-thunderbolt port0-partner.1:
probe with driver typec-thunderbolt failed with error -17
[Fix]
The patch ease the call trace and only shows the firmware bug warning in the log
[Test]
Boot up the machine which shows the same call trace after booted up, the call
trace should be replaced by something like this
ucsi_acpi USBC000:00: con0: Firmware bug: duplicate partner altmode SVID
0x8087 at offset 1, ignoring. Please update your system firmware.
[Where problems could occur]
It doesn't affect functionalities, just detect the duplicated modes and skip it.
** Affects: linux-oem-6.14 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2127960
Title:
Ease the sysfs call trace which comes from ucsi firmware issue
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