linux-kernel - Re: [PATCH v14 01/10] power: reset: reboot-mode: Synchronize list traversal

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Message-ID: <472265f5-8463-e0ed-6386-f52478d4f2fd@oss.qualcomm.com>
Date: Wed, 17 Sep 2025 22:36:22 +0530
From: Shivendra Pratap <shivendra.pratap@....qualcomm.com>
To: Sebastian Reichel <sebastian.reichel@...labora.com>
Cc: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>, Rob Herring <robh@...nel.org>,
        Sudeep Holla <sudeep.holla@....com>,
        Souvik Chakravarty <Souvik.Chakravarty@....com>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Andy Yan <andy.yan@...k-chips.com>,
        Mark Rutland <mark.rutland@....com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Arnd Bergmann <arnd@...db.de>, Konrad Dybcio <konradybcio@...nel.org>,
        cros-qcom-dts-watchers@...omium.org, Vinod Koul <vkoul@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Florian Fainelli <florian.fainelli@...adcom.com>,
        Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
        Mukesh Ojha <mukesh.ojha@....qualcomm.com>,
        Stephen Boyd <swboyd@...omium.org>,
        Andre Draszik
 <andre.draszik@...aro.org>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
        Elliot Berman <quic_eberman@...cinc.com>,
        Srinivas Kandagatla <srini@...nel.org>
Subject: Re: [PATCH v14 01/10] power: reset: reboot-mode: Synchronize list
 traversal



On 9/17/2025 12:14 AM, Sebastian Reichel wrote:
> Hi,
> 
> On Fri, Aug 15, 2025 at 08:05:06PM +0530, Shivendra Pratap wrote:
>> List traversals must be synchronized to prevent race conditions
>> and data corruption. The reboot-mode list is not protected by a
>> lock currently, which can lead to concurrent access and race.
>>
>> Introduce a mutex lock to guard all operations on the reboot-mode
>> list and ensure thread-safe access. The change prevents unsafe
>> concurrent access on reboot-mode list.
>>
>> Signed-off-by: Shivendra Pratap <shivendra.pratap@....qualcomm.com>
>> ---
> 
> This should use scoped_guard() and a Fixes: tag. Otherwise LGTM.

ACK. Will update this patch based on scoped_guard() and add a Fixes tag.

thanks,
Shivendra