linux-kernel - [PATCH -next v2 0/3] cleanup of devtmpfs_*

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Date:   Fri, 10 Feb 2023 09:54:41 +0000
From:   Longlong Xia <xialonglong1@...wei.com>
To:     <gregkh@...uxfoundation.org>
CC:     <chenwandun@...wei.com>, <linux-kernel@...r.kernel.org>,
        <rafael@...nel.org>, <sunnanyong@...wei.com>,
        <wangkefeng.wang@...wei.com>, <xialonglong1@...wei.com>
Subject: [PATCH -next v2 0/3] cleanup of devtmpfs_*_node()

In one test, when modprobe zram, no zram device was found in the /dev. 
But don't see any errors printed in jouranls/dmesg. Later we found out 
that the reason was that device_add() did not check its return value when
calling devtmpfs_create_node().

The test steps:
1. Set the SElinux label of /dev to user_home_t 
2. modprobe zram num_devices=1000

v1 -> v2:
- New patch 1 to add error handling for devtmpfs_create_node().
- use dev_err() to replace pr_err_ratelimited in [2].
- only remove return value of devtmpfs_delete_node() in [3].

Longlong Xia (3):
  driver core: add error handling for devtmpfs_create_node()
  devtmpfs: add debug info to handle()
  devtmpfs: remove return value of devtmpfs_delete_node()

 drivers/base/base.h     |  4 ++--
 drivers/base/core.c     |  6 +++++-
 drivers/base/devtmpfs.c | 20 ++++++++++++++------
 3 files changed, 21 insertions(+), 9 deletions(-)

-- 
2.25.1