* [Bug 212725] New: USB CDC ACM device stop working
@ 2021-04-19 21:18 bugzilla-daemon
2021-04-19 21:26 ` [Bug 212725] " bugzilla-daemon
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0 siblings, 6 replies; 7+ messages in thread
From: bugzilla-daemon @ 2021-04-19 21:18 UTC (permalink / raw)
To: linux-usb
https://bugzilla.kernel.org/show_bug.cgi?id=212725
Bug ID: 212725
Summary: USB CDC ACM device stop working
Product: Drivers
Version: 2.5
Kernel Version: 5.11.15
Hardware: x86-64
OS: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: USB
Assignee: drivers_usb@kernel-bugs.kernel.org
Reporter: stefan@agner.ch
Regression: No
When trying to use USB CDC ACM devices (open using screen) opening fails and
the kernel dmesg shows the following error:
kernel: cdc_acm 1-3.3.3:1.0: acm_port_activate - usb_submit_urb(ctrl irq)
failed
This happens with STM32 microcontroller based device as well as a Segger JTAG
adapter, so it seems not device related. The issue must have been introduced
recently (within the last month) as those devices used to work previously. I
can reproduce the issue also with latest LTS kernel release 5.10.31.
Builds:
- 5.10.31-1-lts
- 5.11.15-arch1-2
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* [Bug 212725] USB CDC ACM device stop working
2021-04-19 21:18 [Bug 212725] New: USB CDC ACM device stop working bugzilla-daemon
@ 2021-04-19 21:26 ` bugzilla-daemon
2021-04-19 21:34 ` bugzilla-daemon
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla-daemon @ 2021-04-19 21:26 UTC (permalink / raw)
To: linux-usb
https://bugzilla.kernel.org/show_bug.cgi?id=212725
--- Comment #1 from Stefan Agner (stefan@agner.ch) ---
I went back and installed some older LTS kernel I had at hand. It seems that
5.10.26 was still working and 5.10.29 is broken. I don't have kernels at hand
inbetween, but hopefully this narrows it down already sufficently.
This is on a AMD Ryzen 9 3900X platform using a AMD X570 motherboard. The USB
2.0 devices are connected through USB 3.0 hub, but also connecting them
directly to the root port seems to exhibit the issue.
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* [Bug 212725] USB CDC ACM device stop working
2021-04-19 21:18 [Bug 212725] New: USB CDC ACM device stop working bugzilla-daemon
2021-04-19 21:26 ` [Bug 212725] " bugzilla-daemon
@ 2021-04-19 21:34 ` bugzilla-daemon
2021-04-20 9:58 ` bugzilla-daemon
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla-daemon @ 2021-04-19 21:34 UTC (permalink / raw)
To: linux-usb
https://bugzilla.kernel.org/show_bug.cgi?id=212725
Stefan Agner (stefan@agner.ch) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |oliver@neukum.org
--- Comment #2 from Stefan Agner (stefan@agner.ch) ---
Some possible candidates:
https://lore.kernel.org/linux-usb/20210311130126.15972-1-oneukum@suse.com/
https://lore.kernel.org/linux-usb/20210311133714.31881-1-oneukum@suse.com/
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* [Bug 212725] USB CDC ACM device stop working
2021-04-19 21:18 [Bug 212725] New: USB CDC ACM device stop working bugzilla-daemon
2021-04-19 21:26 ` [Bug 212725] " bugzilla-daemon
2021-04-19 21:34 ` bugzilla-daemon
@ 2021-04-20 9:58 ` bugzilla-daemon
2021-04-20 13:35 ` bugzilla-daemon
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla-daemon @ 2021-04-20 9:58 UTC (permalink / raw)
To: linux-usb
https://bugzilla.kernel.org/show_bug.cgi?id=212725
--- Comment #3 from Oliver Neukum (oliver@neukum.org) ---
Created attachment 296439
--> https://bugzilla.kernel.org/attachment.cgi?id=296439&action=edit
fix a poison/unpoison imbalance
Please test this patch
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* [Bug 212725] USB CDC ACM device stop working
2021-04-19 21:18 [Bug 212725] New: USB CDC ACM device stop working bugzilla-daemon
` (2 preceding siblings ...)
2021-04-20 9:58 ` bugzilla-daemon
@ 2021-04-20 13:35 ` bugzilla-daemon
2021-04-22 11:36 ` bugzilla-daemon
2021-04-28 21:39 ` bugzilla-daemon
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla-daemon @ 2021-04-20 13:35 UTC (permalink / raw)
To: linux-usb
https://bugzilla.kernel.org/show_bug.cgi?id=212725
--- Comment #4 from Stefan Agner (stefan@agner.ch) ---
Thanks for the quick response!
Applied and built a 5.11.15 kernel with that patch. It indeed seems to fix the
issue!
It did not apply cleanly on 5.11.15 or master, there is a `spin_lock_irq` in
that area. I just moved the acm_unpoison_urbs after the suspend counter
decrement, not sure if that is the correct fix though.
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* [Bug 212725] USB CDC ACM device stop working
2021-04-19 21:18 [Bug 212725] New: USB CDC ACM device stop working bugzilla-daemon
` (3 preceding siblings ...)
2021-04-20 13:35 ` bugzilla-daemon
@ 2021-04-22 11:36 ` bugzilla-daemon
2021-04-28 21:39 ` bugzilla-daemon
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla-daemon @ 2021-04-22 11:36 UTC (permalink / raw)
To: linux-usb
https://bugzilla.kernel.org/show_bug.cgi?id=212725
Stefan Agner (stefan@agner.ch) changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |CODE_FIX
--- Comment #5 from Stefan Agner (stefan@agner.ch) ---
Addressed with:
https://lore.kernel.org/linux-usb/20210421074513.4327-1-oneukum@suse.com/T/#u
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* [Bug 212725] USB CDC ACM device stop working
2021-04-19 21:18 [Bug 212725] New: USB CDC ACM device stop working bugzilla-daemon
` (4 preceding siblings ...)
2021-04-22 11:36 ` bugzilla-daemon
@ 2021-04-28 21:39 ` bugzilla-daemon
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla-daemon @ 2021-04-28 21:39 UTC (permalink / raw)
To: linux-usb
https://bugzilla.kernel.org/show_bug.cgi?id=212725
--- Comment #6 from Stefan Agner (stefan@agner.ch) ---
FWIW, the issue is now fixed in kernels v5.11.17/v5.10.33. I guess it will make
it into v5.12.1 (at this point not yet released).
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