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Srinivas Kandagatla 985131a81e ASoC: qcom: sdw: fix memory leak for sdw_stream_runtime 
[ Upstream commit bcba172793 ]

For some reason we endedup allocating sdw_stream_runtime for every cpu dai,
this has two issues.
1. we never set snd_soc_dai_set_stream for non soundwire dai, which
   means there is no way that we can free this, resulting in memory leak
2. startup and shutdown callbacks can be called without
   hw_params callback called. This combination results in memory leak
because machine driver sruntime array pointer is only set in hw_params
callback.

Fix this by
 1. adding a helper function to get sdw_runtime for substream
which can be used by shutdown callback to get hold of sruntime to free.
 2. only allocate sdw_runtime for soundwire dais.

Fixes: d32bac9cb0 ("ASoC: qcom: Add helper for allocating Soundwire stream runtime")
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc: Stable@vger.kernel.org
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
Tested-by: Steev Klimaszewski <threeway@gmail.com> # Thinkpad X13s
Link: https://patch.msgid.link/20251022143349.1081513-2-srinivas.kandagatla@oss.qualcomm.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2026-01-08 10:15:04 +01:00
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README 

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.