diff --git a/kernel/setup-subm.sh b/kernel/setup-subm.sh
index 75ee749e..456af4a3 100755
--- a/kernel/setup-subm.sh
+++ b/kernel/setup-subm.sh
@@ -39,13 +39,12 @@ perform_cleanup() {
 # Sets up or update KernelSU environment
 setup_kernelsu() {
     echo "[+] Setting up KernelSU..."
-    test -d "$KERNEL_DIR/KernelSU"
-    git submodule add https://github.com/mlm-games/KernelSU-Non-GKI KernelSU
+    test -d "$KERNEL_DIR/KernelSU" || git submodule add https://github.com/mlm-games/KernelSU-Non-GKI KernelSU
     git submodule update --init --recursive
 
     if [ -n "$1" ]; then
         (cd KernelSU && git checkout "$1") && echo "[-] Checked out $1." || echo "[-] Failed to checkout $1."
-    else
+    fi
     
     # Add entries in Makefile and Kconfig if not already existing
     grep -q "kernelsu" "$DRIVER_MAKEFILE" || printf "\nobj-\$(CONFIG_KSU) += kernelsu/\n" >> "$DRIVER_MAKEFILE" && echo "[+] Modified Makefile."
@@ -65,4 +64,4 @@ elif [ "$1" = "--cleanup" ]; then
 else
     initialize_variables
     setup_kernelsu "$@"
-fi
+fi
\ No newline at end of file