From: Akash Asthana <akashast@codeaurora.org>
To: Roja Rani Yarubandi <rojay@codeaurora.org>, wsa@kernel.org
Cc: swboyd@chromium.org, dianders@chromium.org,
saiprakash.ranjan@codeaurora.org, gregkh@linuxfoundation.org,
mka@chromium.org, msavaliy@qti.qualcomm.com,
skakit@codeaurora.org, rnayak@codeaurora.org, agross@kernel.org,
bjorn.andersson@linaro.org, linux-arm-msm@vger.kernel.org,
linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org,
sumit.semwal@linaro.org, linux-media@vger.kernel.org
Subject: Re: [PATCH V8 1/1] i2c: i2c-qcom-geni: Add shutdown callback for i2c
Date: Tue, 12 Jan 2021 13:00:40 +0530 [thread overview]
Message-ID: <1cf28a5a-6de0-1f4e-4cd0-3a1f8125c1ca@codeaurora.org> (raw)
In-Reply-To: <20210108150545.2018-2-rojay@codeaurora.org>
On 1/8/2021 8:35 PM, Roja Rani Yarubandi wrote:
> If the hardware is still accessing memory after SMMU translation
> is disabled (as part of smmu shutdown callback), then the
> IOVAs (I/O virtual address) which it was using will go on the bus
> as the physical addresses which will result in unknown crashes
> like NoC/interconnect errors.
>
> So, implement shutdown callback to i2c driver to stop on-going transfer
> and unmap DMA mappings during system "reboot" or "shutdown".
>
> Fixes: 37692de5d523 ("i2c: i2c-qcom-geni: Add bus driver for the Qualcomm GENI I2C controller")
> Signed-off-by: Roja Rani Yarubandi <rojay@codeaurora.org>
Reviewed-by: Akash Asthana <akashast@codeaurora.org>
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,\na Linux Foundation Collaborative Project
next prev parent reply other threads:[~2021-01-12 7:31 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-08 15:05 [PATCH V8 0/1] Implement Shutdown callback for geni-i2c Roja Rani Yarubandi
2021-01-08 15:05 ` [PATCH V8 1/1] i2c: i2c-qcom-geni: Add shutdown callback for i2c Roja Rani Yarubandi
2021-01-12 7:30 ` Akash Asthana [this message]
2021-01-13 6:54 ` Stephen Boyd
2021-02-18 14:15 ` rojay
2021-02-24 7:06 ` Stephen Boyd
2021-02-24 9:20 ` Wolfram Sang
2021-04-20 11:12 ` rojay
2021-03-01 19:59 ` [PATCH V8 0/1] Implement Shutdown callback for geni-i2c patchwork-bot+linux-arm-msm
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=1cf28a5a-6de0-1f4e-4cd0-3a1f8125c1ca@codeaurora.org \
--to=akashast@codeaurora.org \
--cc=agross@kernel.org \
--cc=bjorn.andersson@linaro.org \
--cc=dianders@chromium.org \
--cc=gregkh@linuxfoundation.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-i2c@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=mka@chromium.org \
--cc=msavaliy@qti.qualcomm.com \
--cc=rnayak@codeaurora.org \
--cc=rojay@codeaurora.org \
--cc=saiprakash.ranjan@codeaurora.org \
--cc=skakit@codeaurora.org \
--cc=sumit.semwal@linaro.org \
--cc=swboyd@chromium.org \
--cc=wsa@kernel.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).