cachefiles: remove err_put_fd label in cachefiles_ondemand_daemon_read()

[ Upstream commit 3e6d704f

 ]

The err_put_fd label is only used once, so remove it to make the code
more readable. In addition, the logic for deleting error request and
CLOSE request is merged to simplify the code.

Signed-off-by: Baokun Li <libaokun1@huawei.com>
Link: https://lore.kernel.org/r/20240522114308.2402121-6-libaokun@huaweicloud.com
Acked-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Jia Zhu <zhujia.zj@bytedance.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Stable-dep-of: 4b4391e7

 ("cachefiles: defer exposing anon_fd until after copy_to_user() succeeds")
Signed-off-by: Sasha Levin <sashal@kernel.org>