[PATCH] drm: Make sure drm_vblank_no_hw_counter isn't abused

[Sean Paul]

On Mon, Aug 8, 2016 at 12:27 PM, Vivi, Rodrigo <rodrigo.vivi at intel.com> wrote:
> Reviewed-by: Rodrigo Vivi <rdorigo.vivi at intel.com>
>
> On Mon, 2016-08-08 at 18:24 +0200, Daniel Vetter wrote:
>> Shouldn't be possible since everyone kzallocs this, but better safe
>> than sorry. Random drive-by-idea really.
>>
>> Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
>> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>


Applied to drm-misc

>> ---
>>  drivers/gpu/drm/drm_irq.c | 1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
>> index f5a9f8cef360..10611a936059 100644
>> --- a/drivers/gpu/drm/drm_irq.c
>> +++ b/drivers/gpu/drm/drm_irq.c
>> @@ -1795,6 +1795,7 @@ 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);
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