test/cxl-events.sh: do not fail test until event counts are reported

Testing revealed that a failed cxl-event test lacked details on the
event counts.  This was because the greps were failing the test rather
than the check against the counts.

Suppress the grep failure and rely on event count checks for pass/fail
of the test.

[ alison: rm reference to DCD in commit log ]

Signed-off-by: Ira Weiny <[email protected]>
Reviewed-by: Dave Jiang <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alison Schofield <[email protected]>

Author: weiny2

test/cxl-events.sh

@@ -71,10 +71,10 @@ echo 0 > /sys/kernel/tracing/tracing_on
 echo "TEST: Events seen"
 trace_out=$(cat /sys/kernel/tracing/trace)
 
-num_overflow=$(grep -c "cxl_overflow" <<< "${trace_out}")
-num_fatal=$(grep -c "log=Fatal" <<< "${trace_out}")
-num_failure=$(grep -c "log=Failure" <<< "${trace_out}")
-num_info=$(grep -c "log=Informational" <<< "${trace_out}")
+num_overflow=$(grep -c "cxl_overflow" <<< "${trace_out}" || true)
+num_fatal=$(grep -c "log=Fatal" <<< "${trace_out}" || true)
+num_failure=$(grep -c "log=Failure" <<< "${trace_out}" || true)
+num_info=$(grep -c "log=Informational" <<< "${trace_out}" || true)
 echo "     LOG     (Expected) : (Found)"
 echo "     overflow      ($num_overflow_expected) : $num_overflow"
 echo "     Fatal         ($num_fatal_expected) : $num_fatal"