30 lines
1.2 KiB
Diff
30 lines
1.2 KiB
Diff
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From a3d94332a2b5128697373d3093c1cfa56649ec61 Mon Sep 17 00:00:00 2001
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From: Daan De Meyer <daan.j.demeyer@gmail.com>
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Date: Mon, 10 Jun 2024 12:59:58 +0200
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Subject: [PATCH] rules: Limit the number of device units generated for serial
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ttys
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As per the suggestion in https://github.com/systemd/systemd/issues/33242.
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This reduces the number of /dev/ttySXX device units generated in
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mkosi from 32 to 4.
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(cherry picked from commit dc38f9addd04c34d1fd743efc407bdebb3573d05)
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---
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rules.d/99-systemd.rules.in | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/rules.d/99-systemd.rules.in b/rules.d/99-systemd.rules.in
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index ad0c7e2fb5..8ba6f177f8 100644
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--- a/rules.d/99-systemd.rules.in
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+++ b/rules.d/99-systemd.rules.in
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@@ -10,6 +10,8 @@
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ACTION=="remove", GOTO="systemd_end"
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SUBSYSTEM=="tty", KERNEL=="tty[a-zA-Z]*|hvc*|xvc*|hvsi*|ttysclp*|sclp_line*|3270/tty[0-9]*", TAG+="systemd"
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+# Exclude 8250 serial ports with a zero IO port, as they are not usable until "setserial /dev/ttySxxx port …" is invoked.
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+SUBSYSTEM=="tty", KERNEL=="ttyS*", DRIVERS=="serial8250", ATTR{port}=="0x0", ENV{SYSTEMD_READY}="0"
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KERNEL=="vport*", TAG+="systemd"
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SUBSYSTEM=="ptp", TAG+="systemd"
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