mvebu: fix sysupgrade failure

Linksys devices do no pass $cmd at all.

Fixes: #16148
Fixes: 715634e6d144 ("base-files: upgrade: nand: use "cmd" argument for extracting command")
Signed-off-by: Boris Krasnovskiy <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/16690
Signed-off-by: Robert Marko <[email protected]>

diff --git a/package/base-files/files/lib/upgrade/nand.sh b/package/base-files/files/lib/upgrade/nand.sh
index 9fa3cd2ddd40db2cdc45efd1e842d9268ca58ec5..ca302557c8ea0f566307171cf9d3a1ac906257db 100644 (file)
--- a/package/base-files/files/lib/upgrade/nand.sh
+++ b/package/base-files/files/lib/upgrade/nand.sh
@@ -300,7 +300,7 @@ nand_upgrade_fit() {
 # Write images in the TAR file to MTD partitions and/or UBI volumes as required
 nand_upgrade_tar() {
        local tar_file="$1"
-       local cmd="$2"
+       local cmd="${2:-cat}"
        local jffs2_markers="${CI_JFFS2_CLEAN_MARKERS:-0}"
 
        # WARNING: This fails if tar contains more than one 'sysupgrade-*' directory.