drm/amdgpu: Switch to interruptable wait to recover from ring hang.
v2: Use dma_fence_wait instead of dma_fence_wait_timeout(...,MAX_SCHEDULE_TIMEOUT) Avoid printing error message for ERESTARTSYS Originally-by: NDavid Panariti <David.Panariti@amd.com> Signed-off-by: NAndrey Grodzovsky <andrey.grodzovsky@amd.com> Reviewed-by: NChristian König <christian.koenig@amd.com> Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>
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