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3df7e8a77e
All the attribute show call-backs check whether pcard is NULL. However, pci_set_drvdata(pdev, pcard) is called before the sysfs files are created during probe, and pci_set_drvdata(pdev, NULL) is not called until after they are destroyed during remove; therefore, pcard will not be NULL, and we can drop the checks. Signed-off-by: Jeremy Sowden <jeremy@azazel.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.
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.