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ath79: mikrotik: erase firmware on SPI NOR before install

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On Mikrotik SPI NOR devices, the firmware partition must be erased when
flashing from stock firmware, otherwise leftover bits (in particular a
kernel signature) can trigger a boot loop.

When booted from initramfs (the only way to install OpenWRT on these
devices), this patch unconditionally erases the firmware partition in
the do_upgrade() stage for all supported SPI NOR devices.

This is forward-ported from ed49d0876 and 20452a8db

Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>
This commit is contained in:
Thibaut VARÈNE 2020-08-17 12:44:13 +02:00 committed by Adrian Schmutzler
parent d0498872ff
commit 2cac31223d
1 changed files with 3 additions and 0 deletions
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target/linux/ath79/mikrotik/base-files/lib/upgrade/platform.sh
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@ -38,6 +38,9 @@ platform_do_upgrade() {
platform_do_upgrade_mikrotik_nand "$1"
;;
*)
# NOR devices: erase firmware if booted from initramfs
[ -z "$(rootfs_type)" ] && mtd erase firmware
default_do_upgrade "$1"
;;
esac