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[ Upstream commitcf1ad559a2] regulator_get_voltage_rdev() is called in regulator probe() when applying machine constraints. The "fixed" commit exposed the problem that non-bypassed regulators can forward the request to its parent (like bypassed ones) supply. Return -EPROBE_DEFER when the supply is expected but not resolved yet. Fixes:aea6cb9970("regulator: resolve supply after creating regulator") Cc: stable@vger.kernel.org Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Reported-by: Ondřej Jirman <megous@megous.com> Reported-by: Corentin Labbe <clabbe.montjoie@gmail.com> Tested-by: Ondřej Jirman <megous@megous.com> Link: https://lore.kernel.org/r/a9041d68b4d35e4a2dd71629c8a6422662acb5ee.1604351936.git.mirq-linux@rere.qmqm.pl Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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 Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
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.