[PATCH V2 2/3] tools/perf/tests: Fix shellcheck warning in record_sideband.sh test

[Athira Rajeev]

Running shellcheck on record_sideband.sh throws below
warning:

	In tests/shell/record_sideband.sh line 25:
	  if ! perf record -o ${perfdata} -BN --no-bpf-event -C $1 true 2>&1 >/dev/null
	    ^--^ SC2069: To redirect stdout+stderr, 2>&1 must be last (or use '{ cmd > file; } 2>&1' to clarify).

This shows shellcheck warning SC2069 where the redirection
order needs to be fixed. Use "cmd > /dev/null 2>&1" to fix
the redirection of perf record output

Fixes: 23b97c7ee963 ("perf test: Add test case for record sideband events")
Signed-off-by: Athira Rajeev <atrajeev at linux.vnet.ibm.com>
Reviewed-by: Kajol Jain <kjain at linux.ibm.com>
---
changelog:
 v1 -> v2:
 Add Reviewed-by from Kajol
 Used "cmd > /dev/null 2>&1" to fix the redirection
 warning from shellcheck

 tools/perf/tests/shell/record_sideband.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/tests/shell/record_sideband.sh b/tools/perf/tests/shell/record_sideband.sh
index 5024a7ce0c51..ac70ac27d590 100755
--- a/tools/perf/tests/shell/record_sideband.sh
+++ b/tools/perf/tests/shell/record_sideband.sh
@@ -22,7 +22,7 @@ trap trap_cleanup EXIT TERM INT
 
 can_cpu_wide()
 {
-    if ! perf record -o ${perfdata} -BN --no-bpf-event -C $1 true 2>&1 >/dev/null
+    if ! perf record -o ${perfdata} -BN --no-bpf-event -C $1 true > /dev/null 2>&1
     then
         echo "record sideband test [Skipped cannot record cpu$1]"
         err=2
-- 
2.31.1