[openwrt/openwrt] layerscape: fix platform_copy_config function

[LEDE Commits]

adrian pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/c51f8030b623e03567a73fbcedc4ee69a8896688

commit c51f8030b623e03567a73fbcedc4ee69a8896688
Author: Pawel Dembicki <paweldembicki at gmail.com>
AuthorDate: Mon Aug 24 12:21:19 2020 +0200

    layerscape: fix platform_copy_config function
    
    At this moment platform_copy_config function is used for every device
    and function "export_partdevice" without "export_bootdevice" causes
    multiple errors like that:
    "sh: 1: unknown operand"
    
    This patch fix usage of export_partdevice and split platform_copy_config
    for sd-card images.
    
    Fixes: 0841b68c91d3 ("layerscape: support sysupgrade for SD card ext4
    rootfs")
    
    Reviewed-by: Yangbo Lu <yangbo.lu at nxp.com>
    Signed-off-by: Pawel Dembicki <paweldembicki at gmail.com>
---
 .../layerscape/base-files/lib/upgrade/platform.sh  | 24 +++++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/target/linux/layerscape/base-files/lib/upgrade/platform.sh b/target/linux/layerscape/base-files/lib/upgrade/platform.sh
index 633cbaf953..de01ac46de 100644
--- a/target/linux/layerscape/base-files/lib/upgrade/platform.sh
+++ b/target/linux/layerscape/base-files/lib/upgrade/platform.sh
@@ -109,15 +109,33 @@ platform_do_upgrade_traverse_nandubi() {
 	nand_do_upgrade "$1" || (echo "Upgrade failed, setting bootsys ${bootsys}" && fw_setenv bootsys $bootsys)
 
 }
-platform_copy_config() {
-	local partdev parttype=ext4
+platform_copy_config_sdboot() {
+	local diskdev partdev parttype=ext4
+
+	export_bootdevice && export_partdevice diskdev 0 || {
+		echo "Unable to determine upgrade device"
+		return 1
+	}
 
 	if export_partdevice partdev 1; then
-		mount -t $parttype -o rw,noatime "/dev/$partdev" /mnt
+		mount -t $parttype -o rw,noatime "/dev/$partdev" /mnt 2>&1
 		cp -af "$UPGRADE_BACKUP" "/mnt/$BACKUP_FILE"
 		umount /mnt
 	fi
 }
+platform_copy_config() {
+	local board=$(board_name)
+
+	case "$board" in
+	fsl,ls1012a-frwy-sdboot | \
+	fsl,ls1021a-twr-sdboot | \
+	fsl,ls1043a-rdb-sdboot | \
+	fsl,ls1046a-rdb-sdboot | \
+	fsl,ls1088a-rdb-sdboot)
+		platform_copy_config_sdboot
+		;;
+	esac
+}
 platform_check_image() {
 	local board=$(board_name)