drm/i915: compute wait_ioctl timeout correctly
We've lost the +1 required for correct timeouts in commit 5ed0bdf2 Author: Thomas Gleixner <tglx@linutronix.de> Date: Wed Jul 16 21:05:06 2014 +0000 drm: i915: Use nsec based interfaces Use ktime_get_raw_ns() and get rid of the back and forth timespec conversions. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Acked-by: NDaniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: NJohn Stultz <john.stultz@linaro.org> So fix this up by reinstating our handrolled _timeout function. While at it bother with handling MAX_JIFFIES. v2: Convert to usecs (we don't care about the accuracy anyway) first to avoid overflow issues Dave Gordon spotted. v3: Drop the explicit MAX_JIFFY_OFFSET check, usecs_to_jiffies should take care of that already. It might be a bit too enthusiastic about it though. v4: Chris has a much nicer color, so use his implementation. This requires to export nsec_to_jiffies from time.c. Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Dave Gordon <david.s.gordon@intel.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=82749 Cc: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com> Acked-by: NJohn Stultz <john.stultz@linaro.org> Signed-off-by: NJani Nikula <jani.nikula@intel.com>
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