ipq806x: switch to full dual-boot for the nbg6817 sysupgrade support
Instead of writing to the currently booted partition set, this implements full dual-boot support for sysupgrade by always writing to the other, currently inactive, partition set and toggling the dualflag after a successful flash. The currently active/ booted partition set is determined by parsing /proc/cmdline for its rootfs parameter (supplied by the DTS), instead of reading from the 0:DUAL_FLAG mtd, in order to prevent (potentially) bricking both partition sets. Signed-off-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>
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42fe7b3bbe
commit
4baffa02ce
1 changed files with 23 additions and 3 deletions
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@ -21,6 +21,7 @@ zyxel_do_flash() {
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local tar_file=$1
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local kernel=$2
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local rootfs=$3
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local dualflagmtd=$4
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# keep sure its unbound
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losetup --detach-all || {
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@ -63,6 +64,16 @@ zyxel_do_flash() {
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umount /tmp/new_root
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}
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# flashing successful, toggle the dualflag
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case "$rootfs" in
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"/dev/mmcblk0p5")
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printf "\xff" >$dualflagmtd
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;;
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"/dev/mmcblk0p8")
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printf "\x01" >$dualflagmtd
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;;
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esac
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# Cleanup
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losetup -d $loopdev >/dev/null 2>&1
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sync
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@ -79,12 +90,21 @@ zyxel_do_upgrade() {
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[ -b "${rootfs}" ] || return 1
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case "$board" in
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zyxel,nbg6817)
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local dualflagmtd="$(find_mtd_part 0:DUAL_FLAG)"
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[ -b $dualflagmtd ] || return 1
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case "$rootfs" in
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"/dev/mmcblk0p5")
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kernel="/dev/mmcblk0p4"
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# booted from the primary partition set
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# write to the alternative set
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kernel="/dev/mmcblk0p7"
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rootfs="/dev/mmcblk0p8"
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;;
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"/dev/mmcblk0p8")
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kernel="/dev/mmcblk0p7"
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# booted from the alternative partition set
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# write to the primary set
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kernel="/dev/mmcblk0p4"
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rootfs="/dev/mmcblk0p5"
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;;
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*)
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return 1
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@ -96,7 +116,7 @@ zyxel_do_upgrade() {
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;;
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esac
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zyxel_do_flash $tar_file $kernel $rootfs
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zyxel_do_flash $tar_file $kernel $rootfs $dualflagmtd
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return 0
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}
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