(In reply to Alex Deucher from comment #4)

> The patch modifies si_apply_state_adjust_rules, I guess it's not applying
> cleanly to your kernel.

I've retried it with the current git tree and it does apply properly. Before I
was trying with kernel 4.9.2. I can confirm that with the patches that were
provided the card does not hang.

I have also tried reverting commit 3a69adfe5617ceba04ad3cff0f9ccad470503fb2
from kernel 4.9.2 (leaving only the sclk limitation) and it also works, no
hangs with sclk=750MHz and mclk=900MHz.