From: Can Guo <cang@codeaurora.org>
To: Bean Huo <huobean@gmail.com>
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: Tue, 05 Jan 2021 09:07:24 +0800 [thread overview]
Message-ID: <7d49c1dfc3f648c484076f3c3a7f4e1e@codeaurora.org> (raw)
In-Reply-To: <80a15afab8024d0b61d312b57585c9322ac91958.camel@gmail.com>
On 2021-01-05 04:05, Bean Huo wrote:
> On Sat, 2021-01-02 at 05:59 -0800, Can Guo wrote:
>> + * @shutting_down: flag to check if shutdown has been invoked
>
> I am not much sure if this flag is need, since once PM going in
> shutdown path, what will be returnded by pm_runtime_get_sync()?
>
> If pm_runtime_get_sync() will fail, just check its return.
>
That depends. During/after shutdown, for UFS's case only,
pm_runtime_get_sync(hba->dev) will most likely return 0,
because it is already RUNTIME_ACTIVE, pm_runtime_get_sync()
will directly return 0... meaning you cannot count on it.
Check Stanley's change -
https://lore.kernel.org/patchwork/patch/1341389/
Can Guo.
> Hi Rafael
> would you please help us confirm this?
>
> thanks,
> Bean
>
>
>> + * @host_sem: semaphore used to serialize concurrent contexts
>> * @eh_wq: Workqueue that eh_work works on
>> * @eh_work: Worker to handle UFS errors that require s/w attention
>> * @eeh_work: Worker to handle exception events
>> @@ -751,7 +753,8 @@ struct ufs_hba {
>> u32 intr_mask;
>> u16 ee_ctrl_mask;
>> bool is_powered;
>> - struct semaphore eh_sem;
>> + bool shutting_down;
>> + struct semaphore host_sem;
next prev parent reply other threads:[~2021-01-05 1:08 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 [this message]
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
[not found] <1609388736-22525-1-git-send-email-cang@codeaurora.org>
2020-12-31 4:25 ` Can Guo
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=7d49c1dfc3f648c484076f3c3a7f4e1e@codeaurora.org \
--to=cang@codeaurora.org \
--cc=adrian.hunter@intel.com \
--cc=alim.akhtar@samsung.com \
--cc=asutoshd@codeaurora.org \
--cc=avri.altman@wdc.com \
--cc=beanhuo@micron.com \
--cc=bvanassche@acm.org \
--cc=hongwus@codeaurora.org \
--cc=huobean@gmail.com \
--cc=jejb@linux.ibm.com \
--cc=kernel-team@android.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=martin.petersen@oracle.com \
--cc=nguyenb@codeaurora.org \
--cc=nitirawa@codeaurora.org \
--cc=rjw@rjwysocki.net \
--cc=rnayak@codeaurora.org \
--cc=salyzyn@google.com \
--cc=saravanak@google.com \
--cc=satyat@google.com \
--cc=stanley.chu@mediatek.com \
--cc=ziqichen@codeaurora.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).