mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 04:34:11 +08:00
drm: hold event_lock while accessing vblank_event_list
Currently the only users of drm_vblank_off() are i915 and gma500, neither of which holds the event_lock when calling this function. Fix this by holding the event_lock while traversing the list. Signed-off-by: Imre Deak <imre.deak@intel.com> Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
This commit is contained in:
parent
9fb7dff5ec
commit
e7783ba3bf
@ -1021,6 +1021,8 @@ void drm_vblank_off(struct drm_device *dev, int crtc)
|
|||||||
|
|
||||||
/* Send any queued vblank events, lest the natives grow disquiet */
|
/* Send any queued vblank events, lest the natives grow disquiet */
|
||||||
seq = drm_vblank_count_and_time(dev, crtc, &now);
|
seq = drm_vblank_count_and_time(dev, crtc, &now);
|
||||||
|
|
||||||
|
spin_lock(&dev->event_lock);
|
||||||
list_for_each_entry_safe(e, t, &dev->vblank_event_list, base.link) {
|
list_for_each_entry_safe(e, t, &dev->vblank_event_list, base.link) {
|
||||||
if (e->pipe != crtc)
|
if (e->pipe != crtc)
|
||||||
continue;
|
continue;
|
||||||
@ -1031,6 +1033,7 @@ void drm_vblank_off(struct drm_device *dev, int crtc)
|
|||||||
drm_vblank_put(dev, e->pipe);
|
drm_vblank_put(dev, e->pipe);
|
||||||
send_vblank_event(dev, e, seq, &now);
|
send_vblank_event(dev, e, seq, &now);
|
||||||
}
|
}
|
||||||
|
spin_unlock(&dev->event_lock);
|
||||||
|
|
||||||
spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
|
spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
|
||||||
}
|
}
|
||||||
|
Loading…
Reference in New Issue
Block a user