Kernel module ch341 bug

[Boguslaw]

Ubuntu 20.04.3 LTS

Kernel module ch341 in Ubuntu kernels 5.4.0-88-generic and 5.4.0-89-generic cannot program any esp8266 modules like Wemos D1 mini which contain ch340 chip uart controller. In kernel 5.4.0-86-generic everything is working good.
Communication over serial connection is working in both cases only programming using esptool is broken, kernel module do not react properly to response fom ch340 chip I suppose

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-89-generic 5.4.0-89.100
ProcVersionSignature: Ubuntu 5.4.0-89.100-generic 5.4.143
Uname: Linux 5.4.0-89-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.20
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: boguslaw 1801 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Tue Oct 19 21:14:32 2021
HibernationDevice: RESUME=UUID=924612b1-306e-46c9-bd1f-7324041efb4a
MachineType: Dell Inc. Latitude E6400
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-89-generic root=UUID=e7494ee9-8c5d-4133-bc4b-57986641b724 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.4.0-89-generic N/A
 linux-backports-modules-5.4.0-89-generic N/A
 linux-firmware 1.187.19
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/04/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A34
dmi.board.name: 0RX493
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA34:bd06/04/2013:svnDellInc.:pnLatitudeE6400:pvr:rvnDellInc.:rn0RX493:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Latitude E6400
dmi.sys.vendor: Dell Inc.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[rojer (rojer9)]

this update caused a regression: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1941798

commit in question is https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/drivers/usb/serial/ch341.c?id=5e940f519a0d7ef1857b51b6ce3eb2a6731d9b26

the issue was reported upstream https://bugzilla.kernel.org/show_bug.cgi?id=214131 and reverted in https://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial.git/commit/?h=usb-linus&id=df7b16d1c00ecb3da3a30c999cdb39f273c99a2f

this commit needs to be brought in