events: Stop dispatching events immediately when requested to stop

Otherwise events received but not yet dispatched are dispatched and can
call hangs in ioctls as the pipeline has likely been stopped.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/events.c b/events.c
index da5e426..15d9535 100644
--- a/events.c
+++ b/events.c
@@ -126,6 +126,10 @@ static void events_dispatch(struct events *events, const fd_set *rfds,
 		if (event->type == OMAP3_ISP_EVENT_EXCEPTION &&
 		    FD_ISSET(event->fd, efds))
 			event->callback(event->priv);
+
+		/* If the callback stopped events processing, we're done. */
+		if (events->done)
+			break;
 	}
 }