base-files: exit if mtd write command fails during sysupgrade

It avoids confusing situations like:
> Could not get image magic
> Image check failed.
> Upgrade completed
> Rebooting system...

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(backported from 5b2e20807d2b38de1cc4185d15bb4320b8bd743a)

diff --git a/package/base-files/files/lib/upgrade/common.sh b/package/base-files/files/lib/upgrade/common.sh
index 38056fd346b1cf990c6db77f4e470ddf58304815..0cbd2ab3a69f9fd75b98e9b01d69913fffe5a746 100644 (file)
--- a/package/base-files/files/lib/upgrade/common.sh
+++ b/package/base-files/files/lib/upgrade/common.sh
@@ -222,6 +222,7 @@ default_do_upgrade() {
        else
                get_image "$1" "$2" | mtd write - "${PART_NAME:-image}"
        fi
        else
                get_image "$1" "$2" | mtd write - "${PART_NAME:-image}"
        fi

+       [ $? -ne 0 ] && exit 1

 }
 
 do_upgrade_stage2() {
 }
 
 do_upgrade_stage2() {