From 75a59f0cc68924f063d52a61bdbb372795d28797 Mon Sep 17 00:00:00 2001
From: Antoine Cellerier <dionoea@videolan.org>
Date: Wed, 30 Nov 2011 23:16:41 +0100
Subject: [PATCH] Raise an error if /dev/root cannot be found.

This can happen when running prep-kernel inside a chroot when configuring a new image.
---
 usr/sbin/prep-kernel | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/usr/sbin/prep-kernel b/usr/sbin/prep-kernel
index 225eaa1..78f40cb 100755
--- a/usr/sbin/prep-kernel
+++ b/usr/sbin/prep-kernel
@@ -51,6 +51,10 @@ efikamx_prep_kernel() {
 	bstmp=$tmp.boot.script
 	bsdst=/boot/boot.scr
 	loadaddr=0x90008000
+
+	if [ ! -e "/dev/root" ]; then
+		error "Could not find root device. Please add a symlink from your root device to /dev/root ."
+	fi
 	rootfs=$(readlink -f /dev/root)
 
 	printf "Generating kernel u-boot image... " >&2