rc: use grep -q instead of redirecting to /dev/null

Signed-off-by: Omar Sandoval <osandov@fb.com>

diff --git a/common/rc b/common/rc
index 99f1909c2476bf06f5bbf0644a89bf44702a0636..088422ce909b8e40eec2c4d2e991c6b754dcf5eb 100644 (file)
--- a/common/rc
+++ b/common/rc
@@ -58,7 +58,7 @@ _have_module() {
 }
 
 _have_module_param() {
-       if ! modinfo -F parm -0 "$1" | grep -z "^$2:" >/dev/null; then
+       if ! modinfo -F parm -0 "$1" | grep -q -z "^$2:"; then
                SKIP_REASON="$1 module does not have parameter $2"
                return 1
        fi