Messages in this thread | | | Subject | Re: [PATCH 2/2] scsi: ufs: Protect PM ops and err_handler from user access through sysfs | From | Bean Huo <> | Date | Mon, 11 Jan 2021 11:04:31 +0100 |
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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
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