test(shmbridge): replace brittle dmesg checks with sysfs and current-boot log validation

Stop relying on raw dmesg grep for qcom_scm presence.

Validate qcom_scm via sysfs first and use current-boot kernel log only for targeted qcom_scm-related error detection to avoid false failures from log flooding.

Signed-off-by: Srikanth Muppandam <smuppand@qti.qualcomm.com>

Author: smuppand

Runner/suites/Kernel/Baseport/shmbridge/run.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
- 
+
 # Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
-# SPDX-License-Identifier: BSD-3-Clause 
+# SPDX-License-Identifier: BSD-3-Clause
 # Locate and source init_env
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 INIT_ENV=""
@@ -13,15 +13,15 @@ while [ "$SEARCH" != "/" ]; do
     fi
     SEARCH=$(dirname "$SEARCH")
 done
- 
+
 if [ -z "$INIT_ENV" ]; then
     echo "[ERROR] Could not find init_env (starting at $SCRIPT_DIR)" >&2
     exit 1
 fi
- 
+
 # shellcheck disable=SC1090
 . "$INIT_ENV"
- 
+
 # shellcheck disable=SC1090,SC1091
 . "$TOOLS/functestlib.sh"
 
@@ -36,8 +36,8 @@ log_info "==== Test Initialization ===="
 
 log_info "Checking if required tools are available"
 
-if ! check_dependencies zcat grep dmesg; then
-    log_skip "$TESTNAME SKIP - missing one or more of zcat grep dmesg utils"
+if ! check_dependencies grep; then
+    log_skip "$TESTNAME SKIP - missing required grep utility"
     echo "$TESTNAME SKIP" >"$res_file"
     exit 0
 fi
@@ -48,22 +48,37 @@ if ! check_kernel_config "CONFIG_QCOM_SCM"; then
     echo "$TESTNAME SKIP" > "$res_file"
     exit 0
 fi
- 
-log_info "Scanning dmesg logs for qcom_scm initialization"
 
-if dmesg | grep -q 'qcom_scm'; then
-    if ! scan_dmesg_errors . "" ""; then
-        log_pass "$TESTNAME : Test Passed (qcom_scm present and no probe failures)"
-        echo "$TESTNAME PASS" > "$res_file" 
-    else
-        log_fail "FAIL: 'probe failure' detected in dmesg."
-        echo "$TESTNAME FAIL" > "$res_file"
-    fi
+log_info "Checking qcom_scm presence using sysfs/current-boot kernel log"
+
+if [ -d /sys/module/qcom_scm ]; then
+    log_pass "qcom_scm driver is present in sysfs."
+elif get_kernel_log 2>/dev/null | grep -qi '\bqcom_scm\b'; then
+    log_pass "qcom_scm present in current-boot kernel log."
 else
-    log_fail "FAIL: 'qcom_scm' not found in dmesg."
+    log_fail "FAIL: qcom_scm not found in sysfs or current-boot kernel log."
+    echo "$TESTNAME FAIL" > "$res_file"
+    exit 0
+fi
+
+scm_log="./qcom_scm_kernel.log"
+scm_err="./qcom_scm_errors.log"
+err_patterns='probe failed|fail(ed)?|error|timed out|not found|invalid|corrupt|abort|panic|oops|unhandled'
+
+log_info "Scanning current-boot kernel log for qcom_scm-related errors"
+get_kernel_log > "$scm_log" 2>/dev/null || true
+grep -iE "qcom_scm.*($err_patterns)" "$scm_log" > "$scm_err" || true
+
+if [ -s "$scm_err" ]; then
+    while IFS= read -r line; do
+        [ -n "$line" ] || continue
+        log_info "[kernel] $line"
+    done < "$scm_err"
+    log_fail "FAIL: qcom_scm-related errors detected in current-boot kernel log."
     echo "$TESTNAME FAIL" > "$res_file"
+else
+    log_pass "$TESTNAME : Test Passed (qcom_scm present and no qcom_scm-related kernel errors)"
+    echo "$TESTNAME PASS" > "$res_file"
 fi
 
 log_info "-------------------Completed $TESTNAME Testcase----------------------------"
-
-