rules: go to the end of rules indeed when dm is suspended

The previous patch 466266c does not make sense indeed, that is to say, if the SYSTEMD_READY is not recorded in the database, the GOTO="systemd_end" will not be applied.

The IMPORT{db} is actually a matching token, it returns false when there is no SYSTEMD_READY recorded in the database.

The previous patch 466266c tended to inherit the state of SYSTEMD_READY from the database and skip to the end of current rule file. But when the database does not contain SYSTEMD_READY, e.g., the dm-* is not set db_persistent during initrd and the database will be cleared after switching root, the following rules will still be applied not as expected.

(cherry picked from commit c1a2ada)
(cherry picked from commit 7237dfc)

Author: jiayi0118

rules.d/99-systemd.rules.in

@@ -19,7 +19,9 @@ SUBSYSTEM=="ubi", TAG+="systemd"
 SUBSYSTEM=="block", TAG+="systemd"
 
 # We can't make any conclusions about suspended DM devices so let's just import previous SYSTEMD_READY state and skip other rules
-SUBSYSTEM=="block", ENV{DM_SUSPENDED}=="1", IMPORT{db}="SYSTEMD_READY", GOTO="systemd_end"
+SUBSYSTEM=="block", ENV{DM_SUSPENDED}=="1", IMPORT{db}="SYSTEMD_READY"
+SUBSYSTEM=="block", ENV{DM_SUSPENDED}=="1", GOTO="systemd_end"
+
 SUBSYSTEM=="block", ACTION=="add", ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}=="1", ENV{SYSTEMD_READY}="0"
 
 # Ignore encrypted devices with no identified superblock on it, since

test/fuzz/fuzz-udev-rules/99-systemd.rules

@@ -17,7 +17,9 @@ SUBSYSTEM=="ubi", TAG+="systemd"
 SUBSYSTEM=="block", TAG+="systemd"
 
 # We can't make any conclusions about suspended DM devices so let's just import previous SYSTEMD_READY state and skip other rules
-SUBSYSTEM=="block", ENV{DM_SUSPENDED}=="1", IMPORT{db}="SYSTEMD_READY", GOTO="systemd_end"
+SUBSYSTEM=="block", ENV{DM_SUSPENDED}=="1", IMPORT{db}="SYSTEMD_READY"
+SUBSYSTEM=="block", ENV{DM_SUSPENDED}=="1", GOTO="systemd_end"
+
 SUBSYSTEM=="block", ACTION=="add", ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}=="1", ENV{SYSTEMD_READY}="0"
 
 # Ignore encrypted devices with no identified superblock on it, since