f2fs: fix gc mode when gc_urgent_high_remaining is 1

Under the current logic, when gc_urgent_high_remaining is set to 1,
the mode will be switched to normal at the beginning, instead of
running in gc_urgent mode.

Let's switch the gc mode back to normal when the gc ends.

Fixes: 26557618 ("f2fs: remove gc_urgent_high_limited for cleanup")
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/gc.c

@@ -96,16 +96,6 @@ static int gc_thread_func(void *data)
 		 * invalidated soon after by user update or deletion.
 		 * So, I'd like to wait some time to collect dirty segments.
 		 */
-		if (sbi->gc_mode == GC_URGENT_HIGH) {
-			spin_lock(&sbi->gc_urgent_high_lock);
-			if (sbi->gc_urgent_high_remaining) {
-				sbi->gc_urgent_high_remaining--;
-				if (!sbi->gc_urgent_high_remaining)
-					sbi->gc_mode = GC_NORMAL;
-			}
-			spin_unlock(&sbi->gc_urgent_high_lock);
-		}
-
 		if (sbi->gc_mode == GC_URGENT_HIGH ||
 				sbi->gc_mode == GC_URGENT_MID) {
 			wait_ms = gc_th->urgent_sleep_time;
@@ -162,6 +152,15 @@ static int gc_thread_func(void *data)
 		/* balancing f2fs's metadata periodically */
 		f2fs_balance_fs_bg(sbi, true);
 next:
+		if (sbi->gc_mode == GC_URGENT_HIGH) {
+			spin_lock(&sbi->gc_urgent_high_lock);
+			if (sbi->gc_urgent_high_remaining) {
+				sbi->gc_urgent_high_remaining--;
+				if (!sbi->gc_urgent_high_remaining)
+					sbi->gc_mode = GC_NORMAL;
+			}
+			spin_unlock(&sbi->gc_urgent_high_lock);
+		}
 		sb_end_write(sbi->sb);
 
 	} while (!kthread_should_stop());