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drm: Make sure drm_vblank_no_hw_counter isn't abused 

Shouldn't be possible since everyone kzallocs this, but better safe
than sorry. Random drive-by-idea really.

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Rodrigo Vivi <rdorigo.vivi@intel.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1470673493-14304-1-git-send-email-daniel.vetter@ffwll.ch
This commit is contained in:
Daniel Vetter 2016-08-08 18:24:53 +02:00 committed by Sean Paul
parent ac08500c1b
commit cfc5adea19
1 changed files with 1 additions and 0 deletions
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1
drivers/gpu/drm/drm_irq.c
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@ -1826,6 +1826,7 @@ EXPORT_SYMBOL(drm_crtc_handle_vblank);
*/
u32 drm_vblank_no_hw_counter(struct drm_device *dev, unsigned int pipe)
{
WARN_ON_ONCE(dev->max_vblank_count != 0);
return 0;
}
EXPORT_SYMBOL(drm_vblank_no_hw_counter);