From: Can Guo <cang@codeaurora.org>
To: asutoshd@codeaurora.org, nguyenb@codeaurora.org,
hongwus@codeaurora.org, ziqichen@codeaurora.org,
rnayak@codeaurora.org, linux-scsi@vger.kernel.org,
kernel-team@android.com, saravanak@google.com,
salyzyn@google.com, cang@codeaurora.org
Subject: [PATCH v3 0/2] Synchronize user layer access with system PM ops and error handling
Date: Sat, 2 Jan 2021 05:59:32 -0800 [thread overview]
Message-ID: <1609595975-12219-1-git-send-email-cang@codeaurora.org> (raw)
This series contains two changes and it is based on 5.11/scsi-queue
The 1st change is just a minor fix.
The 2nd change is to synchronize user layer access through UFS sysfs nodes, so that system PM ops (suspend, resume and shutdown), error handling and async probe won't be disturbed by user layer access. The protection is only added to some sysfs nodes, not all of them.
Change since v2:
- Updated the 1st change, added a global boolean flag to tell if system suspend is invoked when hba is NULL, it is used during resume in case of hba becomes not NULL.
Change since v1:
- Slightly updated the 2nd change, added a dedicated inline func to check hba->shutting_down in ufshcd.h. This inline func can be updated to add more rules for sysfs passage in future.
Can Guo (2):
scsi: ufs: Fix a possible NULL pointer issue
scsi: ufs: Protect PM ops and err_handler from user access through
sysfs
drivers/scsi/ufs/ufs-sysfs.c | 104 ++++++++++++++++++++++++++++++++++++-------
drivers/scsi/ufs/ufshcd.c | 49 ++++++++++++--------
drivers/scsi/ufs/ufshcd.h | 10 ++++-
3 files changed, 128 insertions(+), 35 deletions(-)
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
next reply other threads:[~2021-01-02 14:00 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-02 13:59 Can Guo [this message]
2021-01-02 13:59 ` [PATCH 1/2] scsi: ufs: Fix a possible NULL pointer issue Can Guo
2021-01-12 6:35 ` Stanley Chu
2021-01-12 6:52 ` Can Guo
2021-01-12 9:17 ` Stanley Chu
2021-01-02 13:59 ` [PATCH 2/2] scsi: ufs: Protect PM ops and err_handler from user access through sysfs Can Guo
2021-01-04 20:05 ` Bean Huo
2021-01-05 1:07 ` Can Guo
2021-01-05 18:38 ` Bean Huo
2021-01-06 1:20 ` Can Guo
2021-01-08 11:29 ` Bean Huo
2021-01-08 13:11 ` Stanley Chu
2021-01-09 4:45 ` Can Guo
2021-01-09 4:51 ` Can Guo
2021-01-10 16:13 ` Bean Huo
2021-01-11 1:27 ` Can Guo
2021-01-11 8:23 ` Bean Huo
2021-01-11 9:22 ` Can Guo
2021-01-11 10:04 ` Bean Huo
2021-01-12 0:45 ` Can Guo
2021-01-12 11:32 ` Bean Huo
2021-01-11 1:52 ` Can Guo
2021-01-10 16:18 ` Bean Huo
2021-01-11 1:30 ` Can Guo
2021-01-11 8:25 ` Bean Huo
2021-01-12 8:20 ` Avri Altman
2021-01-12 9:36 ` Stanley Chu
2021-01-13 4:18 ` [PATCH v3 0/2] Synchronize user layer access with system PM ops and error handling Martin K. Petersen
2021-01-13 4:23 ` Can Guo
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