From: Bean Huo <huobean@gmail.com>
To: Can Guo <cang@codeaurora.org>
Cc: 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, rjw@rjwysocki.net,
Alim Akhtar <alim.akhtar@samsung.com>,
Avri Altman <avri.altman@wdc.com>,
"James E.J. Bottomley" <jejb@linux.ibm.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Stanley Chu <stanley.chu@mediatek.com>,
Bean Huo <beanhuo@micron.com>,
Nitin Rawat <nitirawa@codeaurora.org>,
Adrian Hunter <adrian.hunter@intel.com>,
Bart Van Assche <bvanassche@acm.org>,
Satya Tangirala <satyat@google.com>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/2] scsi: ufs: Protect PM ops and err_handler from user access through sysfs
Date: Mon, 11 Jan 2021 11:04:31 +0100 [thread overview]
Message-ID: <6eaa5c51c0b17968e0169b8a16bdbfa4934af5d8.camel@gmail.com> (raw)
In-Reply-To: <7f193fe5abfb41aa72d17f7884cbd113@codeaurora.org>
On Mon, 2021-01-11 at 17:22 +0800, Can Guo wrote:
> > > meaning you are tring to access a register when clocks are
> > > disabled.
> > > This
> > > leads to system CRASH.
> > >
> >
> > OK, let it simple, share this kind of crash log becuase of access
> > sysfs
> > node in the shutdown flow.
> >
> >
> > > [2] OCP is over current protection. While UFS shutting down, you
> > > may
> > > have put UFS regulators to LPM. After that, if you are still
> > > trying
> > > to
> > > talk to UFS, OCP can happen on VCCQ/VCCQ2. This leads to system
> > > CRASH
> > > too.
> >
> > the same as above, share the crash log.
> >
>
> If you have hand-on experiences on NoC and/or OCP issues, you won't
> ask
> for the crash log. The tricky parts about critial NoC and OCP issues
> is
OK, interesting. would you tell me which register access node in ufs-
sysfs.c can trigger this crash? let me verify your statement.
Bean
>
next prev parent reply other threads:[~2021-01-11 10:05 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1609595975-12219-1-git-send-email-cang@codeaurora.org>
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 [this message]
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
[not found] <1609388736-22525-1-git-send-email-cang@codeaurora.org>
2020-12-31 4:25 ` Can Guo
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