AW: [PATCH 0/7] lantiq: initial support for x490 Fritzboxes

[Mathias Kresin]

2/15/22 08:56, kestrel1974 at t-online.de:
> Hi,
> 
> without specifying any of the options from Torstens commit, with my PR the following is printed during boot:
> [   13.493508] pci 0000:02:00.0: xHCI HW not ready after 5 sec (HC bug?) status = 0x801
> [   13.499854] pci 0000:02:00.0: quirk_usb_early_handoff+0x0/0x8f4 took 4894168 usecs
> [   13.509105] UBI: auto-attach mtd1
> [   13.511042] ubi0: attaching mtd1
> [   13.672281] ubi0: scanning is finished
> [   13.687360] ubi0: attached mtd1 (name "ubi", size 48 MiB)
> [   13.691364] ubi0: PEB size: 131072 bytes (128 KiB), LEB size: 129024 bytes
> [   13.698322] ubi0: min./max. I/O unit sizes: 2048/2048, sub-page size 512
> [   13.705011] ubi0: VID header offset: 512 (aligned 512), data offset: 2048
> [   13.711700] ubi0: good PEBs: 384, bad PEBs: 0, corrupted PEBs: 0
> [   13.717793] ubi0: user volume: 2, internal volumes: 1, max. volumes count: 128
> [   13.724992] ubi0: max/mean erase counter: 2/0, WL threshold: 4096, image sequence number: 955112811
> [   13.734025] ubi0: available PEBs: 0, total reserved PEBs: 384, PEBs reserved for bad PEB handling: 80
> [   13.743384] ubi0: background thread "ubi_bgt0d" started, PID 456
> [   13.751194] block ubiblock0_0: created from ubi0:0(rootfs)
> [   13.755363] ubiblock: device ubiblock0_0 (rootfs) set to be root fil[   13.768689] Freeing unused kernel memory: 3820K
> [   13.771792] This architecture does not have kernel memory protection.
> [   13.778325] Run /init as init process
> 
> In the Image config, $(Device/NAND) is specified, which uses the definitions from target/lantiq/image/Makefile, isn't that already ubifs enablement?
> It was not required to build any of the ubi images to get the messages above.
> 
> So is the creation of the ubi image really neccessary?
> What additional benefit does building the ubi images have?
> 
> And as you can see, even though $(Device/NAND) specifies 4k page size, ubi will use what the NAND chip declares.
> 
> Thanks.


Please do not top post!

Yes the way you are doing it is correct.

I got confused by ubi image vs. using ubi. An ubi image is only required 
for boards which do not have an ubi partition from the beginning. Back 
in the days, yaffs or squashfs on raw nand was used by some vendors. For 
such cases, the ubi partition need to be created during first/initial 
flash using an ubi(nized) image.

Mathias