f2fs: trigger rapid GC only when screen state actually changes

While it's normal for these events to happen after the other one,
with AOD or poorly made kernel source, we can receive the same event
consequently.

Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 7a121ea..a3bf509 100644 (file)
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -327,10 +327,14 @@ static int fb_notifier_callback(struct notifier_block *self,
 
        switch (*blank) {
        case FB_BLANK_POWERDOWN:
+               if (trigger_rapid_gc)
+                       return NOTIFY_OK;
                trigger_rapid_gc = true;
                queue_work(system_power_efficient_wq, &rapid_gc_fb_worker);
                break;
        case FB_BLANK_UNBLANK:
+               if (!trigger_rapid_gc)
+                       return NOTIFY_OK;
                trigger_rapid_gc = false;
                queue_work(system_power_efficient_wq, &rapid_gc_fb_worker);
                break;