Re: [PATCH v2] ubi: gluebi: Fix NULL pointer dereference caused by ftl notifier

[Richard Weinberger]

----- Ursprüngliche Mail -----
> Von: "Gagan Sidhu" <broly@xxxxxxx>
> typically what happens is we will wrap a squashfs filesystem inside a UBI layer.
> openwrt people call this “ubinising” the root filesystem.
> 
> then, after we label the appropriate nand partitions as ‘uimage,fw’ to call the
> right mtdsplit, the mtd_ubi subsystem works its magic automatically, as long as
> the root partition is named “rootfs”.
> 
> at that point, the rootfs will be *AUTOMATICALLY* mounted AND booted from BY THE
> KERNEL. that is, no cmdline hacks are required.
> 
> this patch breaks that behaviour since mr wang’s additional conditions result in
> the failure of the partition to get added to the mtd list, and thus fails
> mount.
> 

Please help me understanding the layering.
So, you have sqaushfs inside an UBI volume and create a UBI block device from that?
And you have enabled gluebi to have the said UBI volume as MTD (and thus as mtdblock too)?

Thanks,
//richard