2f75238014
We use the ops owner module hold to protect against ops memory disappearing. But this approach does not protect us from a driver that unregisters ops but forgets to remove netdev(s) that were created using this ops. In such case, we are left with netdev(s), which can not be removed since ops is gone. Moreover, batch netdevs removing on deinitialization is a desireable option for WWAN drivers as it is a quite common task. Implement deletion of all created links on WWAN netdev ops unregistering in the same way that RTNL removes all links on RTNL ops unregistering. Simply remove all child netdevs of a device whose WWAN netdev ops is unregistering. This way we protecting the kernel from buggy drivers and make it easier to write a driver deinitialization code. Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com> Reviewed-by: Loic Poulain <loic.poulain@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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.