From 5d8f9e03f15fb775e6cf7809052bbb7223268aa8 Mon Sep 17 00:00:00 2001
From: John Crispin <john@openwrt.org>
Date: Thu, 9 Apr 2015 14:33:03 +0000
Subject: [PATCH] base-files: add support for platform_pre_upgrade function
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Current NAND sysupgrade process is a bit hard to follow due to the way
of triggering stage1. Currently this is done by leaving a /mark/ in the
form of /tmp/sysupgrade-nand-path during nand_do_platform_check.
Existence of this mark stops standard sysupgrade process (as the result
of sysupgrade_pre_upgrade exit). This may be a bit misleading.

Proposed solution adds a new function that will allow platform.sh
trigger NAND sysupgrade consciously. This will also allow cleaning
nand_do_platform_check limiting it to just checking the image.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

SVN-Revision: 45338
---
 package/base-files/files/sbin/sysupgrade | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/package/base-files/files/sbin/sysupgrade b/package/base-files/files/sbin/sysupgrade
index 215f482352..ef83c4b00f 100755
--- a/package/base-files/files/sbin/sysupgrade
+++ b/package/base-files/files/sbin/sysupgrade
@@ -215,6 +215,14 @@ fi
 
 run_hooks "" $sysupgrade_pre_upgrade
 
+# Some platforms/devices may want different sysupgrade process, e.g. without
+# killing processes yet or calling ubus system upgrade method.
+# This is needed e.g. on NAND devices where we just want to trigger stage1 at
+# this point.
+if type 'platform_pre_upgrade' >/dev/null 2>/dev/null; then
+	platform_pre_upgrade "$ARGV"
+fi
+
 ubus call system upgrade
 touch /tmp/sysupgrade
 
-- 
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