[Bug 214131] New: ch341 communication problem

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=214131

            Bug ID: 214131
           Summary: ch341 communication problem
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.14-rc5
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: USB
          Assignee: drivers_usb@kernel-bugs.kernel.org
          Reporter: pb.g@gmx.de
        Regression: No

Created attachment 298411
  --> https://bugzilla.kernel.org/attachment.cgi?id=298411&action=edit
captured communication

Several users reported their USB-Serial Adapter based on ch341 driver does not
communicate correctly anymore with kernels somewhere above 5.10.56-1.  

The problem is that flashing an ESP8266 board is not possible anymore with
Arduino IDE resulting in a 

"/dev/ttyUSB0 failed to connect: Failed to connect to ESP8266: Timed out
waiting for packet header"

error.

I can confirm this issue up to kernel 5.14-rc5. 
Downgrading my kernel to 5.10.52 also solves the problem.

I attached two communication samples from github user jypma.

The issue is was discussed here:
https://github.com/espressif/esptool/issues/653

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