Re: [RFC PATCH V2 2/2] mmc: allow card to disable tuning

[Erick Shepherd]

Sorry about that, the context for this change is that I have been
working with a DDR50 swissbit SD card that does not support tuning.
The case I'm seeing is that the first tuning times out and any
further tuning attempts cause an async page read I/O error. I used
this change to prevent the card from attempting to tune again if it
is ever reset in the case where we know tuning isn't supported.

Regards
Erick