drm/amdgpu: invalidate L2 before SDMA IBs (on gfx10)

[Pierre-Eric Pelloux-Prayer]

Hi Marek,

With this patch applied I could replay a trace (that usually caused a sdma
timeout on the first run) several times in a row without any issues.

So you can tag the commit as:
Tested-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer at amd.com>

Thanks,
Pierre-Eric



On 25/04/2020 10:52, Marek Olšák wrote:
> This should fix SDMA hangs on gfx10.
> 
> Marek
> 
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