Your message dated Sat, 15 May 2021 06:43:20 -0700 (PDT)
with message-id <[email protected]>
and subject line Closing this bug (BTS maintenance for src:linux bugs)
has caused the Debian Bug report #867365,
regarding 8250_moxa: interferes with hardware
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
867365: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=867365
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Source: linux
Severity: normal

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
   * What exactly did you do (or not do) that was effective (or
     ineffective)?
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From: root <root@gavbuntu>
To: Debian Bug Tracking System <[email protected]>
Subject: 8250_moxa: driver causes hardware fault
Message-ID: <149930682178.1976.1310054348253285119.reportbug@nexusnpu>
X-Mailer: reportbug 7.1.7
Date: Thu, 06 Jul 2017 02:07:01 +0000

Source: linux
Version: 4.9.30-2+deb9u2
Severity: normal

Dear Maintainer,

After upgrading to this kernel version, my Moxa CP-132EL serial card no longer 
works correctly.

Specifically, when an application requested a baud rate of 115200, the baud 
rate actually used was 123600 (or thereabouts), and when requesting a baud rate 
of 921600, the baud rate actually used was 1000000 (which this card isn't 
supposed to even be capable of).

I am using the official vendor driver for this card, via a DKMS wrapper package 
that I wrote myself.  The wrapper can be found at 
https://github.com/uecasm/mxser.git (and a link to the vendor code can be found 
there too).

It appears that even loading the 8250_moxa driver causes the fault -- if it is 
loaded at boot, then I rmmod it and modprobe the mxupcie vendor driver, the 
fault remains.

(Trying to use the 8250_moxa driver by itself does not work; while it 
recognises the hardware it does not appear to communicate at any baud rate.)

I can work around the problem by blacklisting the 8250_moxa driver.

The problem also does not occur with linux-image-4.9.0-2-amd64 (4.9.13-1 
2017-02-27), which is the kernel I had been using prior to this -- it appears 
that the 8250_moxa driver was disabled in that configuration.

So it appears this driver is faulty and I would suggest disabling it again.

-- System Information:
Debian Release: 9.0
  APT prefers testing
  APT policy: (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.9.0-3-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_NZ.UTF-8, LC_CTYPE=en_NZ.UTF-8 (charmap=UTF-8), 
LANGUAGE=en_NZ.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

-- System Information:
Debian Release: 9.0
  APT prefers testing
  APT policy: (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.9.0-3-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_NZ.UTF-8, LC_CTYPE=en_NZ.UTF-8 (charmap=UTF-8), 
LANGUAGE=en_NZ.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

--- End Message ---
--- Begin Message ---
Hi

This bug was filed for a very old kernel or the bug is old itself
without resolution.

If you can reproduce it with

- the current version in unstable/testing
- the latest kernel from backports

please reopen the bug, see https://www.debian.org/Bugs/server-control
for details.

Regards,
Salvatore

--- End Message ---

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