From: Matthias Kaehlcke <mka@chromium.org>
To: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Cc: Viresh Kumar <viresh.kumar@linaro.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Thara Gopinath <thara.gopinath@linaro.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org
Subject: Re: [PATCH 2/3] cpufreq: qcom-hw: Fix probable nested interrupt handling
Date: Thu, 11 Nov 2021 08:28:41 -0800 [thread overview]
Message-ID: <YY1EubypukOK3Ux4@google.com> (raw)
In-Reply-To: <20211111154808.2024808-3-vladimir.zapolskiy@linaro.org>
On Thu, Nov 11, 2021 at 05:48:07PM +0200, Vladimir Zapolskiy wrote:
> Re-enabling an interrupt from its own interrupt handler may cause
> an interrupt storm, if there is a pending interrupt and because its
> handling is disabled due to already done entrance into the handler
> above in the stack.
>
> Also, apparently it is improper to lock a mutex in an interrupt contex.
>
> Fixes: 275157b367f4 ("cpufreq: qcom-cpufreq-hw: Add dcvs interrupt support")
> Signed-off-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
next prev parent reply other threads:[~2021-11-11 16:28 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-11 15:48 [PATCH 0/3] cpufreq: qcom-hw: a few fixes in qcom cpufreq driver Vladimir Zapolskiy
2021-11-11 15:48 ` [PATCH 1/3][RESEND] cpufreq: qcom-cpufreq-hw: Avoid stack buffer for IRQ name Vladimir Zapolskiy
2021-11-11 16:36 ` Matthias Kaehlcke
2021-11-12 20:16 ` Dmitry Baryshkov
2021-11-13 18:55 ` Bjorn Andersson
2021-11-13 18:53 ` Bjorn Andersson
2021-11-11 15:48 ` [PATCH 2/3] cpufreq: qcom-hw: Fix probable nested interrupt handling Vladimir Zapolskiy
2021-11-11 16:28 ` Matthias Kaehlcke [this message]
2021-11-13 18:52 ` Bjorn Andersson
2021-11-11 15:48 ` [PATCH 3/3] cpufreq: qcom-hw: Set CPU affinity of dcvsh interrupts Vladimir Zapolskiy
2021-11-11 16:32 ` Matthias Kaehlcke
2021-11-25 6:50 ` [PATCH 0/3] cpufreq: qcom-hw: a few fixes in qcom cpufreq driver Viresh Kumar
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