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caa41c47da
There is an unbalanced pm_runtime_enable() in etm4_probe_platform_dev()
when etm4_probe() fails. This problem can be observed via the coresight
etm4 module's (load -> unload -> load) sequence when etm4_probe() fails
in etm4_probe_platform_dev().
[ 63.379943] coresight-etm4x 7040000.etm: Unbalanced pm_runtime_enable!
[ 63.393630] coresight-etm4x 7140000.etm: Unbalanced pm_runtime_enable!
[ 63.407455] coresight-etm4x 7240000.etm: Unbalanced pm_runtime_enable!
[ 63.420983] coresight-etm4x 7340000.etm: Unbalanced pm_runtime_enable!
[ 63.420999] coresight-etm4x 7440000.etm: Unbalanced pm_runtime_enable!
[ 63.441209] coresight-etm4x 7540000.etm: Unbalanced pm_runtime_enable!
[ 63.454689] coresight-etm4x 7640000.etm: Unbalanced pm_runtime_enable!
[ 63.474982] coresight-etm4x 7740000.etm: Unbalanced pm_runtime_enable!
This fixes the above problem - with an explicit pm_runtime_disable() call
when etm4_probe() fails during etm4_probe_platform_dev().
Cc: Lorenzo Pieralisi <lpieralisi@kernel.org>
Cc: Hanjun Guo <guohanjun@huawei.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Len Brown <lenb@kernel.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: James Clark <james.clark@arm.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: linux-acpi@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: coresight@lists.linaro.org
Fixes:
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.