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Jerry Zhang
9286e24b83
Currently, the midi function is not freed until it is both removed from the config and released by the user. Since the user could take a long time to release the card, it's possible that the function could be unlinked and thus f_midi_opts would be null when freeing f_midi. Thus, refcount f_midi_opts and only free it when it is unlinked and all f_midis have been freed. Signed-off-by: Jerry Zhang <zhangjerry@google.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
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.