Data loss issue (and solution) for MTK uSD driver

[Enrico Mioso]

Hello all!!

I experienced an issue that could cause data loss on a uSD card when used in some ramips MT7621 devices, like the Zbtlink ZBT-WG3526 (32M).
I fixed it by following the nice solution pointed our here:
https://forum.openwrt.org/t/a-lot-of-errors-with-sd-card-reader-mikrotik-rbm33g/36760

I would like to say thanks to the author.

Is there something we can do to fix this in a general way?
The issue is important enough, given the fact that just mounting, creating a folder and umounting the device is enough to get e2fsck screaming at you! :)
The same card seems to work fine on a GB-PC1. I am experiencing this issue with OpenWRt snapshot (commit ec6293febc244d187e71a6e54f44920be679cde4), running 5.4 kernel.

I seen the FS get corrupted several times. BTW, has this the potential to damage the card itself?

Thanks!!

Enrico