Your message dated Tue, 22 Apr 2025 14:39:58 +0000
with message-id <[email protected]>
and subject line Bug#1103883: fixed in libserial 1.0.0-10
has caused the Debian Bug report #1103883,
regarding libserial1: Occasional exception when writing to the serial port
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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--
1103883: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1103883
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: libserial1
Version: 1.0.0-9+b2
Severity: normal
Tags: patch upstream
Dear Maintainer,
when writing data to a serial port, occasional exception "Interrupted system
call"
is thrown by libserial. This is because there is no retry in case a call to
tcdrain
returns EINTR.
The bug was reported upstream:
https://github.com/crayzeewulf/libserial/issues/194
A pull request was also submitted:
https://github.com/crayzeewulf/libserial/pull/195
The proposed fix was tested in a special setup where data was continuosly
written
to the serial port through libserial and at the same time repeated systemcalls
via
sysfs were made. Without the change the exception could be easily reproduced,
after
the proposed change it did not occur anymore for several days.
I ask you to include this patch in Debian as I don't expect a new upstream
release
for this.
Thanks,
Tobias
-- System Information:
Debian Release: trixie/sid
APT prefers testing
APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: arm64, armhf
Kernel: Linux 6.12.11-amd64 (SMP w/10 CPU threads; PREEMPT)
Kernel taint flags: TAINT_SOFTLOCKUP
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8),
LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages libserial1 depends on:
ii libc6 2.41-6
ii libgcc-s1 14.2.0-19
ii libstdc++6 14.2.0-19
libserial1 recommends no packages.
libserial1 suggests no packages.
-- no debconf information
From: Tobias Graemer <[email protected]>
Date: Thu, 10 Apr 2025 10:31:17 +0200
Subject: [PATCH] Call tcdrain with retry
When writing to the serial port, exception "interrupted system call"
was observed. System calls that are interrupted shall be repeated, as
explained in the description of call_with_retry() template function.
---
src/SerialPort.cpp | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/SerialPort.cpp b/src/SerialPort.cpp
index e354fcb..b5b4d12 100644
--- a/src/SerialPort.cpp
+++ b/src/SerialPort.cpp
@@ -922,7 +922,7 @@ namespace LibSerial
throw NotOpen(ERR_MSG_PORT_NOT_OPEN) ;
}
- if (tcdrain(this->mFileDescriptor) < 0)
+ if (call_with_retry(tcdrain, this->mFileDescriptor) < 0)
{
throw std::runtime_error(std::strerror(errno)) ;
}
--- End Message ---
--- Begin Message ---
Source: libserial
Source-Version: 1.0.0-10
Done: Gianfranco Costamagna <[email protected]>
We believe that the bug you reported is fixed in the latest version of
libserial, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Gianfranco Costamagna <[email protected]> (supplier of updated libserial
package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Tue, 22 Apr 2025 15:51:44 +0200
Source: libserial
Built-For-Profiles: noudeb
Architecture: source
Version: 1.0.0-10
Distribution: unstable
Urgency: medium
Maintainer: Gianfranco Costamagna <[email protected]>
Changed-By: Gianfranco Costamagna <[email protected]>
Closes: 1103883
Changes:
libserial (1.0.0-10) unstable; urgency=medium
.
[ Gianfranco Costamagna ]
* Bump std-version to 4.7.2
.
[ Tobias Graemer ]
* Fix occasional exception when writing to the serial port (Closes:
#1103883)
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