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pcifront_try_connect() and pcifront_attach_devices() share a large chunk of duplicated code for reading the config information from Xenstore, which only differs regarding calling pcifront_rescan_root() or pcifront_scan_root(). Put that code into a new sub-function. It is fine to always call pcifront_rescan_root() from that common function, as it will fallback to pcifront_scan_root() if the domain/bus combination isn't known yet (and pcifront_scan_root() should never be called for an already known domain/bus combination anyway). In order to avoid duplicate messages for the fallback case move the check for domain/bus not known to the beginning of pcifront_rescan_root(). While at it fix the error reporting in case the root-xx node had the wrong format. As the return value of pcifront_try_connect() and pcifront_attach_devices() are not used anywhere make those functions return void. As an additional bonus this removes the dubious return of -EFAULT in case of an unexpected driver state. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Jason Andryuk <jandryuk@gmail.com> Signed-off-by: Juergen Gross <jgross@suse.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.
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.