Re: [PATCH 2/2] drm/amdgpu: Avoid overflows/divide-by-zero in latency_watermark calculations.

On Wed, Mar 29, 2017 at 4:09 PM, Mario Kleiner wrote: > At dot clocks > approx. 250 Mhz, some of these calcs will overflow and > cause miscalculation of latency watermarks, and for some overflows also > divide-by-zero driver crash ("divide error: [#1] PREEMPT SMP"

[PATCH 2/2] drm/amdgpu: Avoid overflows/divide-by-zero in latency_watermark calculations.

At dot clocks > approx. 250 Mhz, some of these calcs will overflow and cause miscalculation of latency watermarks, and for some overflows also divide-by-zero driver crash ("divide error: [#1] PREEMPT SMP" in "dce_v10_0_latency_watermark+0x12d/0x190"). This zero-divide happened, e.g., on AMD