linux-kernel - Re: [PATCH] coresight: Fix crash when Perf and sysfs modes are used concurrently

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Message-Id: <169749720984.709368.4192452224332206520.b4-ty@arm.com>
Date:   Tue, 17 Oct 2023 00:05:30 +0100
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     coresight@...ts.linaro.org, James Clark <james.clark@....com>,
        hejunhao3@...wei.com
Cc:     Suzuki K Poulose <suzuki.poulose@....com>,
        Mike Leach <mike.leach@...aro.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Leo Yan <leo.yan@...aro.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] coresight: Fix crash when Perf and sysfs modes are used concurrently

On Fri, 6 Oct 2023 14:14:52 +0100, James Clark wrote:
> Partially revert the change in commit 6148652807ba ("coresight: Enable
> and disable helper devices adjacent to the path") which changed the bare
> call from source_ops(csdev)->enable() to coresight_enable_source() for
> Perf sessions. It was missed that coresight_enable_source() is
> specifically for the sysfs interface, rather than being a generic call.
> This interferes with the sysfs reference counting to cause the following
> crash:
> 
> [...]

Applied, thanks!

[1/1] coresight: Fix crash when Perf and sysfs modes are used concurrently
      https://git.kernel.org/coresight/c/078dbba3f0c9

Best regards,
-- 
Suzuki K Poulose <suzuki.poulose@....com>