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Takashi Iwai authored
Theoretically the initialization functions in usx2y drivers may be
called multiple times as the driver gets initialized via hwpdep
ioctl.  Meanwhile, those functions including memory allocations don't
check whether they are called twice, and they forget the old
resources, which would lead to memory leaks.

This patch adds the sanity checks about the doubly initializations to
give kernel WARNING, and returns an error in such a case.  Also, each
allocation assures to release the resources at its error path
properly.

Link: https://lore.kernel.org/r/20210517131545.27252-7-tiwai@suse.de


Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
02d382af
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.

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.