From e1a4f69cb5a3b8e9ab372b9d7c526814a6f60db9 Mon Sep 17 00:00:00 2001
From: Florian Fainelli <florian@openwrt.org>
Date: Sun, 28 Mar 2010 11:55:07 +0000
Subject: [PATCH] sysupgrade: Get target device from kernel cmdline, patch from
 acinonyx

SVN-Revision: 20538
---
 target/linux/x86/base-files/lib/upgrade/platform.sh | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/target/linux/x86/base-files/lib/upgrade/platform.sh b/target/linux/x86/base-files/lib/upgrade/platform.sh
index 9871e62c61..d765c5e6ba 100644
--- a/target/linux/x86/base-files/lib/upgrade/platform.sh
+++ b/target/linux/x86/base-files/lib/upgrade/platform.sh
@@ -13,8 +13,12 @@ platform_check_image() {
 }
 
 platform_do_upgrade() {
+	local ROOTFS
 	sync
-	get_image "$1" > /dev/sda
+	grep -q -e "jffs2" -e "squashfs" /proc/cmdline \
+		&& ROOTFS="$(awk 'BEGIN { RS=" "; FS="="; } ($1 == "block2mtd.block2mtd") { print substr($2,1,index($2, ",")-1) }' < /proc/cmdline)" \
+		|| ROOTFS="$(awk 'BEGIN { RS=" "; FS="="; } ($1 == "root") { print $2 ) }' < /proc/cmdline)"
+	[ -b ${ROOTFS%[0-9]} ] && get_image "$1" > ${ROOTFS%[0-9]}
 }
 
 x86_prepare_ext2() {
-- 
2.30.2