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drm: Remove preempt_disable() from vblank timestamping code.
Preemption handling will get pushed into the kms drivers in followup patches, to make timestamping more robust and PREEMPT_RT friendly. Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
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1 changed files with 0 additions and 7 deletions
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@ -586,11 +586,6 @@ int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev, int crtc,
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* code gets preempted or delayed for some reason.
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*/
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for (i = 0; i < DRM_TIMESTAMP_MAXRETRIES; i++) {
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/* Disable preemption to make it very likely to
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* succeed in the first iteration even on PREEMPT_RT kernel.
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*/
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preempt_disable();
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/* Get system timestamp before query. */
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stime = ktime_get();
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@ -602,8 +597,6 @@ int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev, int crtc,
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if (!drm_timestamp_monotonic)
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mono_time_offset = ktime_get_monotonic_offset();
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preempt_enable();
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/* Return as no-op if scanout query unsupported or failed. */
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if (!(vbl_status & DRM_SCANOUTPOS_VALID)) {
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DRM_DEBUG("crtc %d : scanoutpos query failed [%d].\n",
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