From e9645877fbf002207b656bfe4171791496dbbab1 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Wed, 1 Jun 2022 08:48:32 +0200
Subject: [PATCH] common: add a helper if a driver is available

Unlike _have_modules this allows allows for a built-in driver.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
---
 common/rc | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/common/rc b/common/rc
index 53ce3c3..1a69728 100644
--- a/common/rc
+++ b/common/rc
@@ -28,6 +28,18 @@ _have_root() {
 	return 0
 }
 
+_have_driver()
+{
+	local modname="${1/-/_}"
+
+	if [ ! -d "/sys/module/${modname}" ] && ! modprobe -q "${modname}"; then
+		SKIP_REASON="driver ${modname} is not available"
+		return 1
+	fi
+
+	return 0
+}
+
 _have_modules() {
 	local missing=()
 	local module
-- 
2.49.0