[PATCH] base-files: upgrade: Fix export_partdevice() quoting

[Brian Norris]

$BOOTDEV_MAJOR may be empty for many of the uevents parsed in this
function. This condition thus tends to fail benignly (we just skip to
the next device), but it can really clutter the stage2 sysupgrade
stderr, since it looks like the "=" operand doesn't have an appropriate
left-hand argument.

Signed-off-by: Brian Norris <computersforpeace at gmail.com>
---
 package/base-files/files/lib/upgrade/common.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package/base-files/files/lib/upgrade/common.sh b/package/base-files/files/lib/upgrade/common.sh
index 53b8865a5788..af1182cb16a3 100644
--- a/package/base-files/files/lib/upgrade/common.sh
+++ b/package/base-files/files/lib/upgrade/common.sh
@@ -232,7 +232,7 @@ export_partdevice() {
 		while read line; do
 			export -n "$line"
 		done < "$uevent"
-		if [ $BOOTDEV_MAJOR = $MAJOR -a $(($BOOTDEV_MINOR + $offset)) = $MINOR -a -b "/dev/$DEVNAME" ]; then
+		if [ "$BOOTDEV_MAJOR" = "$MAJOR" -a $(($BOOTDEV_MINOR + $offset)) = "$MINOR" -a -b "/dev/$DEVNAME" ]; then
 			export "$var=$DEVNAME"
 			return 0
 		fi
-- 
2.35.1