f2fs: return proper error from start_gc_thread

when there is an error from kthread_run, then return proper error
rather than returning -ENOMEM.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

1 files changed, 10 insertions, 5 deletions

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 25b083c81d50..ddc2c6750eee 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -91,23 +91,28 @@ int start_gc_thread(struct f2fs_sb_info *sbi)
 {
         struct f2fs_gc_kthread *gc_th;
         dev_t dev = sbi->sb->s_bdev->bd_dev;
+        int err = 0;
 
         if (!test_opt(sbi, BG_GC))
-                return 0;
+                goto out;
         gc_th = kmalloc(sizeof(struct f2fs_gc_kthread), GFP_KERNEL);
-        if (!gc_th)
-                return -ENOMEM;
+        if (!gc_th) {
+                err = -ENOMEM;
+                goto out;
+        }
 
         sbi->gc_thread = gc_th;
         init_waitqueue_head(&sbi->gc_thread->gc_wait_queue_head);
         sbi->gc_thread->f2fs_gc_task = kthread_run(gc_thread_func, sbi,
                         "f2fs_gc-%u:%u", MAJOR(dev), MINOR(dev));
         if (IS_ERR(gc_th->f2fs_gc_task)) {
+                err = PTR_ERR(gc_th->f2fs_gc_task);
                 kfree(gc_th);
                 sbi->gc_thread = NULL;
-                return -ENOMEM;
         }
-        return 0;
+
+out:
+        return err;
 }
 
 void stop_gc_thread(struct f2fs_sb_info *sbi)