On Thu, 7 Nov 2024 21:30:19 +0800 Jijie Shao wrote:

Subject: [PATCH RESEND net 3/7] net: hns3: Resolved the issue that the debugfs query result is inconsistent.
Date: Thu, 7 Nov 2024 21:30:19 +0800
X-Mailer: git-send-email 2.30.0

From: Hao Lan <redacted>

This patch modifies the implementation of debugfs:
When the user process stops unexpectedly, not all data of the file system
is read. In this case, the save_buf pointer is not released. When the user
process is called next time, save_buf is used to copy the cached data
to the user space. As a result, the queried data is inconsistent. To solve
this problem, determine whether the function is invoked for the first time
based on the value of *ppos. If *ppos is 0, obtain the actual data.

What do you mean by "inconsistent" ?
What if two processes read the file at once?