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Mark Brown c96e16dfbf staging: bcm2835-audio: Validate values written to controls
The bcm2835-audio driver makes no effort to validate the values it accepts
from userspace, causing it to accept invalid values:

# # PCM Playback Switch.0 Invalid boolean value 2
# not ok 5 write_invalid.Headphones.1
# # PCM Playback Volume.0 value -10240 less than minimum -10239
# # PCM Playback Volume.0 value 401 more than maximum 400
# not ok 12 write_invalid.Headphones.0

Add validation.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20250415-staging-bcm2835-alsa-limit-v1-1-4ed816e9c0fc@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-04-15 16:31:30 +02:00
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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.