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9becde08f1
During chip registration we should neither check the return value of gc->get_direction() nor hold the SRCU lock when calling it. The former is because pin controllers may have pins set to alternate functions and return errors from their get_direction() callbacks. That's alright - we should default to the safe INPUT state and not bail-out. The latter is not needed because we haven't registered the chip yet so there's nothing to protect against dynamic removal. In fact: we currently hit a lockdep splat. Revert to calling the gc->get_direction() callback directly and *not* checking its value. 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.