Bug#988207: linux-image-5.10.0-6-amd64: Multiple CDC devices does not work after migration Buster->Bullseye

[Salvatore Bonaccorso <carnil@debian.org>]

Control: forcemerge 986995 988207
Hi,

On Fri, May 07, 2021 at 09:04:19PM +0200, Andrii Beregovenko wrote:
> Package: src:linux
> Version: 5.10.28-1
> Severity: important
> X-Debbugs-Cc: jet@jet.kiev.ua
> 
> Dear Maintainer,
> 
> Recently I've upgraded from stable to upcoming stable.
> The default kernel has been updated from 4.19 to 5.10 as well.
> Immediatelly I discovered my builtin 3G modem stoped working.
> 
> Also several other devices stoped working as well:
>  * Some Arduino boards
>  * USB tethering from my smart phone (via USB cable)
>  * Several embedded devkits
>  * Some special UAV hardware(flight controllers like pixhawk, pixracer)
> 
> The similar point of all of them they are using cdc_acm driver for USB connection
> handling. The device is getting registered with no problem.
> However as soon as I'm trying to open (or NetworkManager tries)
> corresponding serial device following message appear in the kernel logs:
> 
>     acm_port_activate - usb_submit_urb(ctrl irq) failed
> 
> ...and corresponding serial port is not opening and is unaccessible.
> 
> Reconnecting USB cable(in case of external device) does not help.
> 
> Using kernel from current stable(4.19) solves problem completely and all
> the devices works properly.

This should be the same as #986995.

Regards,
Salvatore