[Bug 101946] Rebinding AMDGPU causes initialization errors [R9 290]

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Comment # 20 on bug 101946 from
Created attachment 133132 [details] [review]
Brute-force fix, resets sdma every init

After much trial and error, I've found this approach to work.
Every hw_init both sDMA's will be flagged for a soft reset.

I have tried the existing soft reset code as well, but the busy status flags
that are being used to selectively reset the sDMA's do not work reliably in my
tests to prevent the errors.

Using this patch the 9 and 10 ring test errors no longer appear and prevents
the ring 1 errors.


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