[Bug 221022] New: [REGRESSION] Kernel panic in ucsi_reset_ppm on 6.1.0-42 after HP USB-C Dock G5 firmware update

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=221022

            Bug ID: 221022
           Summary: [REGRESSION] Kernel panic in ucsi_reset_ppm on
                    6.1.0-42 after HP USB-C Dock G5 firmware update
           Product: Drivers
           Version: 2.5
          Hardware: Intel
                OS: Linux
            Status: NEW
          Severity: low
          Priority: P3
         Component: USB
          Assignee: drivers_usb@kernel-bugs.kernel.org
          Reporter: stamdar@gmail.com
        Regression: No

Created attachment 309280
  --> https://bugzilla.kernel.org/attachment.cgi?id=309280&action=edit
dmesg

I'm experiencing a kernel panic during boot on kernel 6.1.0-42-amd64 that does
not occur on 6.1.0-35-amd64. The issue appeared immediately after updating the
HP USB-C Dock G5 firmware from 1.0.18.0 to 1.0.24.0 via fwupd.

## System Information

- **Hardware**: ASUS Zephyrus M GU502GV (Intel Core i7-9750H, RTX 2060 Mobile)
- **Distribution**: Debian 12 (Bookworm)
- **Working Kernel**: 6.1.0-35-amd64 (6.1.137-1)
- **Broken Kernel**: 6.1.0-42-amd64 (6.1.159-1)
- **Dock**: HP USB-C Dock G5 (firmware 1.0.24.0)

## Problem Description

After updating the dock firmware, kernel 6.1.0-42 hangs during boot at the UCSI
driver initialization. The system becomes completely unresponsive and never
reaches the login screen. Kernel 6.1.0-35 boots successfully with the same
firmware.

## Error Messages

**Kernel 6.1.0-42** (boot hangs after this):
```
WARNING: CPU: 5 PID: 107 at drivers/usb/typec/ucsi/ucsi.c:918
ucsi_reset_ppm+0x210/0x220 [typec_ucsi]
ucsi_acpi USBC000:00: con1: failed to register partner alt modes (-70)
```

**Kernel 6.1.0-35** (boots successfully with warning):
```
WARNING: CPU: 10 PID: 117 at drivers/usb/typec/ucsi/ucsi.c:917
ucsi_reset_ppm+0x210/0x220 [typec_ucsi]
ucsi_acpi USBC000:00: con1: failed to register partner alt modes (-70)
typec port0: bound usb1-port4 (ops connector_ops [usbcore])
typec port0: bound usb2-port1 (ops connector_ops [usbcore])
[boot continues successfully]
```

The same UCSI error occurs in both kernels, but 6.1.0-42 treats it as fatal
while 6.1.0-35 logs the warning and continues.

## Reproduction

1. Update HP USB-C Dock G5 firmware to 1.0.24.0 via fwupd
2. Boot system with dock connected
3. System hangs at UCSI initialization on 6.1.0-42
4. Boot with kernel 6.1.0-35 - system boots normally

## Additional Information

**UCSI driver status on working kernel (6.1.0-35):**
```
$ lsmod | grep ucsi
ucsi_acpi              16384  0
typec_ucsi             53248  1 ucsi_acpi
roles                  20480  1 typec_ucsi
typec                  94208  1 typec_ucsi
```

**USB-C port status:**
```
$ cat /sys/class/typec/port0/data_role
[host] device
$ cat /sys/class/typec/port0/power_role
source [sink]
$ cat /sys/class/typec/port0/supported_accessory_modes
none
```

**Dock detection (working kernel):**
```
$ lsusb | grep HP
Bus 002 Device 004: ID 03f0:066b HP, Inc HP USB-C Dock G5
Bus 001 Device 009: ID 03f0:046b HP, Inc HP USB-C Dock G5
Bus 001 Device 007: ID 03f0:056b HP, Inc USB Audio
Bus 001 Device 006: ID 03f0:036b HP, Inc HP USB-C Dock G5
```

## Expected Behavior

Kernel 6.1.0-42 should handle the UCSI error the same way as 6.1.0-35 - log the
warning and continue boot rather than hanging.

## Workaround

Booting kernel 6.1.0-35 works perfectly. All dock functionality (USB devices,
Ethernet) works correctly, though DisplayPort Alt Mode fails to initialize on
both kernels.

## Attachments

I can provide:
- Full dmesg output from both kernels
- Complete /sys/class/typec/ directory contents
- Detailed lsusb -v output for the dock
- Kernel config differences between versions

Let me know if you need any additional information.

Thanks

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