O2 micro sdcard reader doesn’t work with kernel 4.2/4.4 on DELL latitude

all of a sudden (don’t know when) my sdcard reader stopped working…

seems there is a bug report and discussion since 4.1.8
https://bugzilla.kernel.org/show_bug.cgi?id=109231
http://comments.gmane.org/gmane.linux.kernel.mmc/34979

this guy seems to have fixed it:
http://www.0xf8.org/2016/01/workaround-for-broken-o2-micro-sd-card-reader-support-since-linux-kernel-version-4-1-8/
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