drm/i915: Set adjustment to zero on Up/Down interrupts if freq is already max/min
When we reach the user's RPS limits, stop requesting an adjustment. Even though we will clamp the requested frequency later, we rely on interrupt masking to disable further adjustments in the same direction. Even though it is unlikely (one scenario is a bug in the driver, another is careful manipulation through the uAPI) if we keep exponentially increasing the adjustment value, it will wrap and cause a negative adjustment. Signed-off-by:Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by:
Sagar Arun Kamble <sagar.a.kamble@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1484884104-28134-2-git-send-email-sagar.a.kamble@intel.com
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e9612823
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