[PATCH 14/22] drm/imx: Unconfuse preclose logic

2016-01-12 Thread Philipp Zabel
Am Montag, den 11.01.2016, 22:41 +0100 schrieb Daniel Vetter: > So this one is special, since it tries to prevent races when userspace > crashes simply by disabling the vblank machinery. Well except that imx > always has vblanks enabled, and the disable_vblank hook actually just > tries to cancel a

[PATCH 14/22] drm/imx: Unconfuse preclose logic

2016-01-11 Thread Daniel Vetter
So this one is special, since it tries to prevent races when userspace crashes simply by disabling the vblank machinery. Well except that imx always has vblanks enabled, and the disable_vblank hook actually just tries to cancel a pending pageflip. Without any locking whatsoever. Of course this is w