ath79: allow skipping hash for Senao sysupgrade

Some vendors of Senao boards have a similar flash layout
situation that causes the need to split the firmware partition
and use the lzma-loader, but do not store
checksums of the partitions or otherwise
do not even have a uboot environment partition.

This adds simple shell logic to skip that part.

Also, simplify some lines and variable usage.

Signed-off-by: Michael Pratt <[email protected]>

target/linux/ath79/generic/base-files/lib/upgrade/failsafe_datachk.sh

@@ -8,8 +8,6 @@
 # So the kernel check is for the loader, the rootfs check is for kernel + rootfs
 
 platform_do_upgrade_failsafe_datachk() {
-	local setenv_script="/tmp/fw_env_upgrade"
-
 	local flash_base=0x9f000000
 
 	local kernel_mtd=$(find_mtd_index ${KERNEL_PART:-kernel})
@@ -34,31 +32,33 @@ platform_do_upgrade_failsafe_datachk() {
 	local rootfs_md5=$($IMAGE_CMD $ROOTFS_FILE | dd bs=4k count=$rootfs_blocks iflag=fullblock | md5sum | cut -d ' ' -f1)
 
 	# prepare new u-boot-env vars
-	printf "vmlinux_start_addr 0x%08x\n" $((flash_base + kernel_offset)) >> $setenv_script
-	printf "vmlinux_size 0x%08x\n" ${kernel_size} >> $setenv_script
-	printf "vmlinux_checksum %s\n" ${kernel_md5} >> $setenv_script
+	printf "vmlinux_start_addr 0x%08x\n" $((flash_base + kernel_offset)) >> $ENV_SCRIPT
+	printf "vmlinux_size 0x%08x\n" ${kernel_size} >> $ENV_SCRIPT
+	printf "vmlinux_checksum %s\n" ${kernel_md5} >> $ENV_SCRIPT
 
-	printf "rootfs_start_addr 0x%08x\n" $((flash_base + rootfs_offset)) >> $setenv_script
-	printf "rootfs_size 0x%08x\n" ${rootfs_size} >> $setenv_script
-	printf "rootfs_checksum %s\n" ${rootfs_md5} >> $setenv_script
+	printf "rootfs_start_addr 0x%08x\n" $((flash_base + rootfs_offset)) >> $ENV_SCRIPT
+	printf "rootfs_size 0x%08x\n" ${rootfs_size} >> $ENV_SCRIPT
+	printf "rootfs_checksum %s\n" ${rootfs_md5} >> $ENV_SCRIPT
 
 	# store u-boot-env
 	mkdir -p /var/lock
-	fw_setenv -s $setenv_script || {
+	[ -n "$SKIP_HASH" ] || fw_setenv -s $ENV_SCRIPT || {
 		echo 'failed to update U-Boot environment'
 		exit 1
 	}
 
 	# sysupgrade
-	sleep 2
-	sync
-	echo 3 > /proc/sys/vm/drop_caches
+	sleep 2 && sync && echo 3 > /proc/sys/vm/drop_caches
+
 	$IMAGE_CMD $KERNEL_FILE | mtd $MTD_ARGS write - ${KERNEL_PART:-kernel}
-	sleep 2
-	sync
+
+	sleep 2 && sync && echo 3 > /proc/sys/vm/drop_caches
+
 	if [ -n "$UPGRADE_BACKUP" ]; then
 		$IMAGE_CMD $ROOTFS_FILE | mtd $MTD_ARGS $MTD_CONFIG_ARGS -j $UPGRADE_BACKUP write - ${ROOTFS_PART:-rootfs}
 	else
 		$IMAGE_CMD $ROOTFS_FILE | mtd $MTD_ARGS write - ${ROOTFS_PART:-rootfs}
 	fi
+
+	sync
 }

target/linux/ath79/generic/base-files/lib/upgrade/platform.sh

@@ -45,6 +45,7 @@ platform_do_upgrade() {
 	watchguard,ap100|\
 	watchguard,ap200|\
 	watchguard,ap300)
+		ENV_SCRIPT="/tmp/fw_env"
 		IMAGE_LIST="tar tzf $1"
 		IMAGE_CMD="tar xzOf $1"
 		KERNEL_PART="loader"

target/linux/ath79/tiny/base-files/lib/upgrade/failsafe_datachk.sh

@@ -8,8 +8,6 @@
 # So the kernel check is for the loader, the rootfs check is for kernel + rootfs
 
 platform_do_upgrade_failsafe_datachk() {
-	local setenv_script="/tmp/fw_env_upgrade"
-
 	local flash_base=0x9f000000
 
 	local kernel_mtd=$(find_mtd_index ${KERNEL_PART:-kernel})
@@ -34,31 +32,33 @@ platform_do_upgrade_failsafe_datachk() {
 	local rootfs_md5=$($IMAGE_CMD $ROOTFS_FILE | dd bs=4k count=$rootfs_blocks iflag=fullblock | md5sum | cut -d ' ' -f1)
 
 	# prepare new u-boot-env vars
-	printf "vmlinux_start_addr 0x%08x\n" $((flash_base + kernel_offset)) >> $setenv_script
-	printf "vmlinux_size 0x%08x\n" ${kernel_size} >> $setenv_script
-	printf "vmlinux_checksum %s\n" ${kernel_md5} >> $setenv_script
+	printf "vmlinux_start_addr 0x%08x\n" $((flash_base + kernel_offset)) >> $ENV_SCRIPT
+	printf "vmlinux_size 0x%08x\n" ${kernel_size} >> $ENV_SCRIPT
+	printf "vmlinux_checksum %s\n" ${kernel_md5} >> $ENV_SCRIPT
 
-	printf "rootfs_start_addr 0x%08x\n" $((flash_base + rootfs_offset)) >> $setenv_script
-	printf "rootfs_size 0x%08x\n" ${rootfs_size} >> $setenv_script
-	printf "rootfs_checksum %s\n" ${rootfs_md5} >> $setenv_script
+	printf "rootfs_start_addr 0x%08x\n" $((flash_base + rootfs_offset)) >> $ENV_SCRIPT
+	printf "rootfs_size 0x%08x\n" ${rootfs_size} >> $ENV_SCRIPT
+	printf "rootfs_checksum %s\n" ${rootfs_md5} >> $ENV_SCRIPT
 
 	# store u-boot-env
 	mkdir -p /var/lock
-	fw_setenv -s $setenv_script || {
+	[ -n "$SKIP_HASH" ] || fw_setenv -s $ENV_SCRIPT || {
 		echo 'failed to update U-Boot environment'
 		exit 1
 	}
 
 	# sysupgrade
-	sleep 2
-	sync
-	echo 3 > /proc/sys/vm/drop_caches
+	sleep 2 && sync && echo 3 > /proc/sys/vm/drop_caches
+
 	$IMAGE_CMD $KERNEL_FILE | mtd $MTD_ARGS write - ${KERNEL_PART:-kernel}
-	sleep 2
-	sync
+
+	sleep 2 && sync && echo 3 > /proc/sys/vm/drop_caches
+
 	if [ -n "$UPGRADE_BACKUP" ]; then
 		$IMAGE_CMD $ROOTFS_FILE | mtd $MTD_ARGS $MTD_CONFIG_ARGS -j $UPGRADE_BACKUP write - ${ROOTFS_PART:-rootfs}
 	else
 		$IMAGE_CMD $ROOTFS_FILE | mtd $MTD_ARGS write - ${ROOTFS_PART:-rootfs}
 	fi
+
+	sync
 }

target/linux/ath79/tiny/base-files/lib/upgrade/platform.sh

@@ -19,6 +19,7 @@ platform_do_upgrade() {
 	engenius,eap350-v1|\
 	engenius,ecb350-v1|\
 	engenius,enh202-v1)
+		ENV_SCRIPT="/tmp/fw_env"
 		IMAGE_LIST="tar tzf $1"
 		IMAGE_CMD="tar xzOf $1"
 		KERNEL_PART="loader"