Hi,
Test Setup:
Host (Linux)
-----------------------------------------
| Host-Side Generic USB USB Host |
| Operating | Serial | Controller | USB
| System | Driver | Driver |--------
| (Linux) | (usbserial.ko) | and | |
| USB Stack | |
----------------------------------------- |
|
|
|
Gadget (TWR-LS1021A, USB2 in ULPI mode) |
-------------------------------------- |
| Gadget USB Periph. | |
| Device-Side | Gadget | Controller | |
| Linux | Serial | Driver |-----------
| Operating | Driver | and |
| System |(g_serial.| USB Stack |
| ko) |
--------------------------------------
I saw kernel crash once. It is very hard to reproduce. The system freezes after the crash. The full log file is attached.
[<80304624>] (_raw_spin_lock_irqsave+0xa/0x34) from [<7f81bbf9>] (gs_put_char+0x16/0x34 [u_serial])
[<7f81bbf9>] (gs_put_char+0x16/0x34 [u_serial]) from [<80185e5f>] (tty_put_char+0x11/0x22)
[<80185e5f>] (tty_put_char+0x11/0x22) from [<80188a03>] (do_output_char+0x109/0x12a)
[<80188a03>] (do_output_char+0x109/0x12a) from [<80188b19>] (__process_echoes+0xf5/0x14e)
[<80188b19>] (__process_echoes+0xf5/0x14e) from [<801891ef>] (commit_echoes+0x37/0x52)
[<801891ef>] (commit_echoes+0x37/0x52) from [<8018a0df>] (__receive_buf+0x2a3/0x504)
[<8018a0df>] (__receive_buf+0x2a3/0x504) from [<8018a383>] (n_tty_receive_buf2+0x43/0x66)
[<8018a383>] (n_tty_receive_buf2+0x43/0x66) from [<8018c215>] (flush_to_ldisc+0x71/0x9a)
[<8018c215>] (flush_to_ldisc+0x71/0x9a) from [<800267b9>] (process_one_work+0x161/0x21c)
[<800267b9>] (process_one_work+0x161/0x21c) from [<80026be9>] (worker_thread+0x179/0x25c)
[<80026be9>] (worker_thread+0x179/0x25c) from [<80029fad>] (kthread+0x5d/0x6c)
[<80029fad>] (kthread+0x5d/0x6c) from [<8000c1f9>] (ret_from_fork+0x11/0x38)
Code: 4603 f3ef 8000 b672 (e853) 1f00
---[ end trace 345734d18d7b1195 ]---
Hardware:
TWR-LS1021A REV C2
TWR-SER2
Software:
SDK 1.7
Original Attachment has been moved to: LS1021A-g_serial-kernel-crash.txt.zip
