From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
To: Marek Szyprowski <m.szyprowski@samsung.com>,
Chanwoo Choi <cw00.choi@samsung.com>,
linux-pm@vger.kernel.org, linux-samsung-soc@vger.kernel.org
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>,
Alim Akhtar <alim.akhtar@samsung.com>
Subject: Re: [PATCH] PM / devfreq: exynos: add Exynos PPMU as a soft module dependency
Date: Thu, 18 May 2023 10:09:51 +0200 [thread overview]
Message-ID: <88987336-9558-e49c-326d-779bd3bc2aa0@linaro.org> (raw)
In-Reply-To: <20230518074403.2894799-1-m.szyprowski@samsung.com>
On 18/05/2023 09:44, Marek Szyprowski wrote:
> Commit adf8238ef403 ("ARM: dts: exynos: move exynos-bus nodes out of soc
> in Exynos4412") changed the order of the exynos-bus nodes, what results
> in different probe order of the Exynos Bus devices. Although the driver
> properly handles the deferred probe and all devices seems to be finally
> properly registered, this change revealed some kind of a bug related to
> PPMU counters registration and passive governor operation. Usually in 1
> of 10 boots this results in complete board freeze during loading of the
> kernel modules.
>
> To avoid that freeze, ensure that the Exynos PPMU driver is already
> loaded before the Exynos Bus driver starts probing.
>
> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Best regards,
Krzysztof
next prev parent reply other threads:[~2023-05-18 8:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20230518074416eucas1p1dfd47a3438f2252211cf7daa82e2ac1e@eucas1p1.samsung.com>
2023-05-18 7:44 ` [PATCH] PM / devfreq: exynos: add Exynos PPMU as a soft module dependency Marek Szyprowski
2023-05-18 8:09 ` Krzysztof Kozlowski [this message]
2023-05-29 14:25 ` Chanwoo Choi
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=88987336-9558-e49c-326d-779bd3bc2aa0@linaro.org \
--to=krzysztof.kozlowski@linaro.org \
--cc=alim.akhtar@samsung.com \
--cc=cw00.choi@samsung.com \
--cc=linux-pm@vger.kernel.org \
--cc=linux-samsung-soc@vger.kernel.org \
--cc=m.szyprowski@samsung.com \
--cc=myungjoo.ham@samsung.com \
/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