From: Yunlei He <heyunlei@huawei.com>
Date: Tue, 24 Apr 2018 03:40:30 +0000 (+0800)
Subject: f2fs: move mnt_want_write_file after range check
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=b82f6e347bfb68920d7e611553e1f3170ee4608c;p=openwrt%2Fstaging%2Fblogic.git

f2fs: move mnt_want_write_file after range check

This patch move mnt_want_write_file after range check,
it's needless to check arguments with it.

Signed-off-by: Yunlei He <heyunlei@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index a68b2cc067bc..10668720a661 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -2061,15 +2061,15 @@ static int f2fs_ioc_gc_range(struct file *filp, unsigned long arg)
 	if (f2fs_readonly(sbi->sb))
 		return -EROFS;
 
+	end = range.start + range.len;
+	if (range.start < MAIN_BLKADDR(sbi) || end >= MAX_BLKADDR(sbi)) {
+		return -EINVAL;
+	}
+
 	ret = mnt_want_write_file(filp);
 	if (ret)
 		return ret;
 
-	end = range.start + range.len;
-	if (range.start < MAIN_BLKADDR(sbi) || end >= MAX_BLKADDR(sbi)) {
-		ret = -EINVAL;
-		goto out;
-	}
 do_more:
 	if (!range.sync) {
 		if (!mutex_trylock(&sbi->gc_mutex)) {