[Intel-gfx] [PATCH 03/12] drm: Make blocking vblank wait return when the vblank interrupts get disabled

[Thierry Reding]

On Wed, May 14, 2014 at 08:51:05PM +0200, Daniel Vetter wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> If there's a blocking vblank wait in progress while the vblank interrupt
> gets disabled, the current code will just let the vblank wait time out.
> Instead make it return immediately when vblank interrupts get disabled.

Can this even happen? drm_wait_vblank() takes a vblank reference earlier
and drops it right before returning. But perhaps this will become
obvious since from a quick peek some of the subsequent patches seem like
they will make it possible to force VBLANK off?

Thierry
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