From f947a506d1d124b275b26fda94e0a996a1b068e2 Mon Sep 17 00:00:00 2001
From: Emilia Kurdybelska <emiliax.kurdybelska@intel.com>
Date: Fri, 6 Mar 2026 10:33:26 +0100
Subject: [PATCH] Revert "hijack.sh: exit_handler: collect dmesg throughout the
 whole test"

This reverts commit c341de8b060e6845301e4b03c39f71e8aac6d477.
---
 case-lib/hijack.sh | 28 ++++++++++++++++++++++++++--
 case-lib/lib.sh    | 41 +----------------------------------------
 2 files changed, 27 insertions(+), 42 deletions(-)

diff --git a/case-lib/hijack.sh b/case-lib/hijack.sh
index f1d1b8a7..6f14e954 100644
--- a/case-lib/hijack.sh
+++ b/case-lib/hijack.sh
@@ -12,8 +12,6 @@ function func_exit_handler()
 
     dlogi "Starting func_exit_handler($exit_status)"
 
-    finish_kmsg_collection
-
     func_lib_check_and_disable_pipewire
 
     # call trace
@@ -136,6 +134,32 @@ function func_exit_handler()
         storage_checks || exit_status=1
     fi
 
+    local journalctl_logs="$LOG_ROOT/dmesg.txt"
+    if [[ "$KERNEL_CHECKPOINT" =~ ^[0-9]{10} ]]; then
+        # Do not collect the entire duration of the test but only the
+        # last iteration.
+        dlogi "Save kernel messages since ${KERNEL_CHECKPOINT} to ${journalctl_logs}"
+        journalctl_cmd --since=@"$KERNEL_CHECKPOINT" > "${journalctl_logs}"
+    elif [[ "$KERNEL_CHECKPOINT" == "disabled" ]]; then
+        dlogi "Save all kernel messages to ${journalctl_logs}"
+        journalctl_cmd > "${journalctl_logs}"
+    else
+       dloge 'Kernel check point "KERNEL_CHECKPOINT" is not properly set'
+       dloge "KERNEL_CHECKPOINT=$KERNEL_CHECKPOINT"
+       test "$exit_status" -ne 0 || exit_status=1
+    fi
+    if test -s "${journalctl_logs}"; then
+       wcLog=$(wc -l "${journalctl_logs}")
+       dlogi  "nlines=$wcLog"
+    else
+       dlogw "Empty ${journalctl_logs}"
+    fi
+    # Make sure the logs are written on disk just in case of DUT power reset.
+    sync
+
+    # After log collected, KERNEL_CHECKPOINT will not be used any more
+    unset KERNEL_CHECKPOINT
+
     # get ps command result as list
     local -a cmd_lst
     # $$ as current script pid
diff --git a/case-lib/lib.sh b/case-lib/lib.sh
index d1ce1cef..15d122ba 100644
--- a/case-lib/lib.sh
+++ b/case-lib/lib.sh
@@ -97,7 +97,7 @@ start_test()
     }
 
     # func_exit_handler() is in hijack.sh
-    trap 'func_exit_handler $?' EXIT SIGTERM
+    trap 'func_exit_handler $?' EXIT
 
     if test -z "$MAX_WAIT_FW_LOADING"; then
         local _pltf; _pltf=$("$SCRIPT_HOME/tools/sof-dump-status.py" -p)
@@ -125,7 +125,6 @@ start_test()
             die "FW is not loaded for $MAX_WAIT_FW_LOADING"
         fi
     }
-    func_kmsg_collect
 
     export SOF_TEST_TOP_PID="$$"
     local prefix; prefix="ktime=$(ktime) sof-test PID=${SOF_TEST_TOP_PID}"
@@ -199,26 +198,6 @@ stop_test()
 }
 
 
-finish_kmsg_collection()
-{
-    if [[ -n "$DMESG_PID" ]]; then
-        kill "$DMESG_PID" 2>/dev/null
-        wait "$DMESG_PID" 2>/dev/null
-        unset KERNEL_CHECKPOINT
-    fi
-
-    local journalctl_logs="$LOG_ROOT/dmesg.txt"
-    if test -s "${journalctl_logs}"; then
-       wcLog=$(wc -l "${journalctl_logs}")
-       dlogi  "nlines=$wcLog"
-    else
-       dlogw "Empty ${journalctl_logs}"
-    fi
-    # Make sure the logs are written on disk just in case of DUT power reset.
-    sync
-}
-
-
 ktime()
 {
     # Keep it coarse because of various delays.
@@ -429,24 +408,6 @@ func_mtrace_collect()
     sudo bash -c "${mtraceCmd[*]} &" >& "$clogfile"
 }
 
-func_kmsg_collect() {
-    local journalctl_logs="$LOG_ROOT/dmesg.txt"
-
-    if [[ "$KERNEL_CHECKPOINT" =~ ^[0-9]{10} ]]; then
-        dlogi "Saving kernel messages since ${KERNEL_CHECKPOINT} to ${journalctl_logs}"
-        journalctl_cmd --since=@"$KERNEL_CHECKPOINT" -f >> "${journalctl_logs}" &
-    elif [[ "$KERNEL_CHECKPOINT" == "disabled" ]]; then
-        dlogi "Saving all kernel messages"
-        journalctl_cmd -f >> "${journalctl_logs}" &
-    else
-        dloge 'Kernel check point "KERNEL_CHECKPOINT" is not properly set'
-        dloge "KERNEL_CHECKPOINT=$KERNEL_CHECKPOINT"
-        test "$exit_status" -ne 0 || exit_status=1
-        return
-    fi
-    DMESG_PID=$!
-}
-
 func_lib_log_post_process()
 {
     # SyS-T log output a Zephyr feature, no need postprocess