From 9d96b6fb720d9cecc7bd50b4f16dabe1b337f9f2 Mon Sep 17 00:00:00 2001 From: Adrian Schmutzler Date: Sun, 27 Dec 2020 20:33:57 +0100 Subject: [PATCH] ath79/mikrotik: disable building NAND images MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The current support for MikroTik NAND-based devices relies on a gross hack that packs the kernel into a static YAFFS stub, as the stock bootloader only supports booting a YAFFS-encapsulated kernel. The problem with this approach is that since the kernel partition is blindly overwritten without any kind of wear or badblock management (due to lack of proper support for YAFFS in OpenWRT), the NAND flash is not worn uniformly and eventually badblocks appear, leading to unbootable devices. This issue has been reported here [1] and discussed in more detail here [2]. [1] https://forum.openwrt.org/t/rb433-bad-sector-cannot-start-openwrt/71519 [2] https://github.com/openwrt/openwrt/pull/3026#issuecomment-673597461 Until a proper fix is found (or the stock bootloader supports other filesystems), we disable building these images to prevent unknowing users from risking their devices. Thanks to Thibaut Varène for summarizing the details above. Signed-off-by: Adrian Schmutzler --- target/linux/ath79/image/common-mikrotik.mk | 1 + 1 file changed, 1 insertion(+) diff --git a/target/linux/ath79/image/common-mikrotik.mk b/target/linux/ath79/image/common-mikrotik.mk index b0c3feda20cc..6e739f2d85be 100644 --- a/target/linux/ath79/image/common-mikrotik.mk +++ b/target/linux/ath79/image/common-mikrotik.mk @@ -17,4 +17,5 @@ define Device/mikrotik_nand IMAGE/sysupgrade.bin = append-kernel | kernel2minor -s 2048 -e -c | \ sysupgrade-tar kernel=$$$$@ | append-metadata DEVICE_PACKAGES := nand-utils + DEFAULT := n endef -- 2.30.2