f2fs: handle dqget error in f2fs_transfer_project_quota()

We should set the error code when dqget() failed.

Fixes: 2c1d0305 ("f2fs: support F2FS_IOC_FS{GET,SET}XATTR")
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/file.c

@@ -3009,15 +3009,16 @@ int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid)
 	struct dquot *transfer_to[MAXQUOTAS] = {};
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 	struct super_block *sb = sbi->sb;
-	int err = 0;
+	int err;
 
 	transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
-	if (!IS_ERR(transfer_to[PRJQUOTA])) {
+	if (IS_ERR(transfer_to[PRJQUOTA]))
+		return PTR_ERR(transfer_to[PRJQUOTA]);
+
 	err = __dquot_transfer(inode, transfer_to);
 	if (err)
 		set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
 	dqput(transfer_to[PRJQUOTA]);
-	}
 	return err;
 }