tools: split ignore_str and give reason for each ignore item

Each ignore item should have a reason. This helps us
to trace every ignore item.

This patch splits ignore_str into ignore items, and provides
descriptions on why each item is ignored.

Fixes: #261

Signed-off-by: Amery Song <chao.song@intel.com>

Author: Amery Song

tools/sof-kernel-log-check.sh

@@ -3,9 +3,23 @@
 begin_line=${1:-1}
 declare err_str ignore_str project_key
 err_str="error|failed|timed out|panic|oops"
-ignore_str="error: debugfs write failed to idle -16|error: status|iteration [01]"
+ignore_str=""
 project_key="sof-audio"
 
+# There will be debug logs at each failed initializaiton of DSP:
+#   sof-audio-pci 0000:00:1f.3: error: status = 0x00000000 panic = 0x00000000
+#   sof-audio-pci 0000:00:1f.3: error: Error code=0xffffffff: FW status=0xffffffff
+#   sof-audio-pci 0000:00:1f.3: error: iteration 0 of Core En/ROM load failed: -110
+# We will reinit DSP if it is failed to init, and retry times is 3, so the errors in
+# debug logs at the frist and second retry can be ignored.
+# Check https://github.com/thesofproject/linux/pull/1676 for more information.
+# TODO explain for "error: Error ..."
+ignore_str="$ignore_str"|'error: iteration [01]'
+ignore_str="$ignore_str"|'error: status'
+
+# TODO explain
+ignore_str="$ignore_str"|'error: debugfs write failed to idle -16'
+
 [[ ! "$err_str" ]] && echo "Missing error keyword list" && exit 0
 # dmesg KB size buffer size
 #dmesg_config_define=$(awk -F '=' '/CONFIG_LOG_BUF_SHIFT/ {print $2;}' /boot/config-$(uname -r))