[LEDE-DEV] ubi-auto-create-ubiblock-device-for-rootfs and mtd-qcom-smem-rename-rootfs-ubi patches not working for me

[J Mo]

Hi everyone

I know there was recently some traffic on the list here about UBI and 
mounting rootfs. I caught some of it, but not all of it. Please pardon 
me if these are already known issues or this doesn't add anything useful 
to the conversation.



I am working on getting the TRENDnet TEW-827DRU booting LEDE. The device 
uses the ipq8064 SoC and NAND flash with a UBI (kernel + squashfs-rootfs 
+ ubifs-overlay). The bootloader is u-boot and while it *might* be 
possible to modify the u-boot parameters (bootcmd= and bootargs=), I am 
currently working on the assumption that I have to ignore them.

Another oddity/problem with my device is that the NAND smem partition 
table has the UBI partition named "rootfs". There is also a patch 
related to this, but it also does not seem to be working 
(302-mtd-qcom-smem-rename-rootfs-ubi.patch).

Currently I am putting my kernel arguments into the DTS as my bootargs. 
It looks like this:

bootargs = "console=ttyMSM0,115200n8 ubi.mtd=11 ubi.block=0,1 
root=/dev/ubiblock0_1 rootfstype=squashfs";

If I don't include the ubi-related commands, the kernel doesn't even 
mount the UBI and fails to boot. I get the feeling that some of the 
patches which should auto-mount that UBI are not working for me.

I am getting this error, even when my system successfully boots:

UBI error: block: can't add 'rootfs' volume, err=-17

Which seems to be coming from 
491-ubi-auto-create-ubiblock-device-for-rootfs.patch



Should I bug these? Already known issues? Comments?

Thanks