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-rw-r--r--drivers/video/pxafb.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/video/pxafb.c b/drivers/video/pxafb.c
index 1e1c4ec0d3b9..ab689597f259 100644
--- a/drivers/video/pxafb.c
+++ b/drivers/video/pxafb.c
@@ -794,11 +794,15 @@ static int pxafb_smart_thread(void *arg)
if (try_to_freeze())
continue;
+ mutex_lock(&fbi->ctrlr_lock);
+
if (fbi->state == C_ENABLE) {
inf->smart_update(&fbi->fb);
complete(&fbi->refresh_done);
}
+ mutex_unlock(&fbi->ctrlr_lock);
+
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(30 * HZ / 1000);
}