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present: Ignore event_id 0 from driver vblank notify

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We use event_id 0 to mean 'no such event'; if a driver sends us that
event_id, make sure we don't accidentally match it.

Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
This commit is contained in:
Keith Packard 2013-11-09 12:33:02 -08:00
parent 4f3c37a1f1
commit a5bcc4f7b9
1 changed files with 3 additions and 0 deletions
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3
present/present.c
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@ -374,6 +374,8 @@ present_event_notify(uint64_t event_id, uint64_t ust, uint64_t msc)
present_vblank_ptr vblank, tmp;
int s;
if (!event_id)
return;
DebugPresent(("\te %lld ust %lld msc %lld\n", event_id, ust, msc));
xorg_list_for_each_entry_safe(vblank, tmp, &present_exec_queue, event_queue) {
if (vblank->event_id == event_id) {
@ -398,6 +400,7 @@ present_event_notify(uint64_t event_id, uint64_t ust, uint64_t msc)
DebugPresent(("\tun %lld\n", event_id));
screen_priv->unflip_event_id = 0;
present_flip_idle(screen);
return;
}
}
}