Thibaut VARENE ed49d08762 ar71xx: mikrotik: erase firmware partition on SPI NOR devices in pre_upgrade()
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 flash LEDE on these devices),
this patch unconditionally erases the firmware partition in the pre_upgrade()
stage for all supported SPI NOR devices.

Signed-off-by: Thibaut VARENE <hacks@slashdirt.org>
2017-02-26 13:30:39 +01:00
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