From: Lennart Poettering <lennart@amutable.com>
Date: Thu, 26 Feb 2026 10:24:21 +0000 (+0100)
Subject: udev: tag DMI id device with "systemd", so that we can order units after it
X-Git-Tag: v261-rc1~789^2~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=56356c9deca6bc2142b8f69c94aea91ca47d81e9;p=thirdparty%2Fsystemd.git

udev: tag DMI id device with "systemd", so that we can order units after it

For various usecases it is useful to read relevant data from the DMI
udev device, but this means we need a way to wait for it for this to be
probed to be race-free. Hence tag it with "systemd", so that
sys-devices-virtual-dmi-id.device can be used as synchronization point.
---

diff --git a/rules.d/60-dmi-id.rules b/rules.d/60-dmi-id.rules
index 10b1fe000ca..ecea74ec60d 100644
--- a/rules.d/60-dmi-id.rules
+++ b/rules.d/60-dmi-id.rules
@@ -2,24 +2,28 @@
 
 ACTION=="remove", GOTO="dmi_end"
 SUBSYSTEM!="dmi", GOTO="dmi_end"
+KERNEL!="id", GOTO="dmi_end"
 
 ENV{ID_SYS_VENDOR_IS_RUBBISH}!="1", ENV{ID_VENDOR}="$attr{sys_vendor}"
 ENV{ID_SYSFS_ATTRIBUTE_MODEL}=="", ENV{ID_PRODUCT_NAME_IS_RUBBISH}!="1", ENV{ID_MODEL}="$attr{product_name}"
 ENV{ID_SYSFS_ATTRIBUTE_MODEL}=="product_name", ENV{ID_MODEL}="$attr{product_name}"
 ENV{ID_SYSFS_ATTRIBUTE_MODEL}=="product_version", ENV{ID_MODEL}="$attr{product_version}"
-# fallback to board information
+# Fallback to board information
 ENV{ID_VENDOR}=="", ENV{ID_VENDOR}="$attr{board_vendor}"
 ENV{ID_MODEL}=="", ENV{ID_MODEL}="$attr{board_name}"
 
-# stock keeping unit
+# Stock keeping unit
 ENV{ID_PRODUCT_SKU_IS_RUBBISH}!="1", ENV{ID_SKU}="$attr{product_sku}"
 
-# hardware version
+# Hardware version
 ENV{ID_PRODUCT_VERSION_IS_RUBBISH}!="1", ENV{ID_HARDWARE_VERSION}="$attr{product_version}"
 ENV{ID_HARDWARE_VERSION}=="", ENV{ID_BOARD_VERSION_IS_RUBBISH}!="1", ENV{ID_HARDWARE_VERSION}="$attr{board_version}"
 
-# chassis asset tag
+# Chassis asset tag
 ENV{MODALIAS}!="", ATTR{chassis_asset_tag}!="", IMPORT{builtin}="hwdb '$attr{modalias}cat$attr{chassis_asset_tag}:'"
 ENV{ID_CHASSIS_ASSET_TAG_IS_RUBBISH}!="1", ENV{ID_CHASSIS_ASSET_TAG}="$attr{chassis_asset_tag}"
 
+# Allow units to be ordered after the DMI device
+TAG+="systemd"
+
 LABEL="dmi_end"